Sound Attenuation for Certain Off-Highway Trucks{0116, 1801, 1806, 7076, 7261, 7329} Caterpillar

Off-Highway Truck:

793D (S/N: FDB1-UP)

793F (S/N: SND1-UP)

797F (S/N: WSP1-UP)

Introduction

The purpose of this document is to provide the field with test sheets needed for sound attenuation testing for the above listed machines.

793D XQ Test Sheet

Table 1

Machine Data
Date		Machine Serial Number
Machine Model		Machine Location
Machine Hours		Technician's Name

Illustration 1	g02793546

Table 2

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (1)
Panel (2)
Panel (3)
Panel (4)
Panel (5)
Panel (6)
Panel (7)

Illustration 2	g02793578

Table 3

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (8)
Panel (9)
Panel (10)
Panel (11)
Panel (12)
Panel (13)
Panel (14)

Illustration 3	g02793590

Table 4

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Two Plate Assemblies (15)
Three Guards (16)
Pan Assembly Under Guards (16)
Two Plate Assemblies (15) are Closed and Latched

Illustration 4	g02793597

Table 5

Item	Yes	No	N/A	Comments
Louver Group
Silencers (17)

Illustration 5	g02793618

Table 6

Item	Yes	No	N/A	Comments
Torque Converter Group
Cover Assembly (18)
Cover Assembly (19)

Illustration 6	g02793619

Table 7

Item	Yes	No	N/A	Comments
Torque Converter Group
Cover Assembly (20)

Illustration 7	g02794476

Table 8

Item	Yes	No	N/A	Comments
Rear Flap and Lights
Flap (21)
Plate (22)
Hanger Assembly (23)
Plate Assembly (24)
Two Lights (25)

Illustration 8	g02794610

Table 9

Item	Yes	No	N/A	Comments
Rear Axle Housing Group
Sound Suppression Cover Assembly (26)
Plate (27)

Illustration 9	g02794619

Table 10

Item	Yes	No	N/A	Comments
Engine Group Left Side
Cover Assembly (29)
Eight Cover Assemblies (30)
Cover Assembly (31)
Eight Cylinder Block Side Covers (32)
Cover Assembly (33)
Cover Assembly (34)
Cover Assembly (35)
Rear Cap Cover (36)
Cover Assembly (37)
Cover Assembly (38)

Illustration 10	g02794626

Table 11

Item	Yes	No	N/A	Comments
Engine Group Right Side
Cover Assembly (39)
Eight Cover Assemblies (40)
Eight Cylinder Block Side Covers (41)
Cover Assembly (42)
Cover Assembly (43)

Illustration 11	g02794636

Table 12

Item	Yes	No	N/A	Comments
Muffler Cover
Panel (44)
Panel (45)
Panel (46)
Panel (47)
Panel (48)
Panel (49)
Panel (50)
Panel (51)
Panel (52)

Illustration 12	g02794639

Table 13

Item	Yes	No	N/A	Comments
Engine Hood with Silencers Attached
Silencer (53)
Silencer (54)
Two Silencers (55)
Five Silencers (56)

Illustration 13	g02799184

Table 14

Item	Yes	No	N/A	Comments
Truck Body
Two Silencers (57)
Two Silencers (58)
Five Silencers (59)
Silencer (60)

Table 15

Item	Yes	No	N/A	Comments
Tire Group	LH	RH
Air Pressure
Condition of Tires - no flaps of rubber present that could create additional noise
Size of Front Tires
Size of Rear Tires
Suspension Groups	LH	RH
Pressure - Front
Pressure - Rear
Suspension Group Height - Front 254 ± 13 mm (10.0 ± 0.5 inch)
Suspension Group Height - Rear 203 ± 13 mm (8.0 ± 0.5 inch)
General	Yes	No	N/A
Are Handrails in place and secure - no cracks, latched in holding position?
Are mirrors secure - all fasteners in place and tight?
Are lights, Reverse and others, secure - all fasteners in place and tight?
Are unit numbers on the chassis and body secure - no cracks, all fasteners in place?
Check rock ejector clearance, cannot impact final drive, or rim to potentially create noise.
Are mud flaps in place and clearance OK, cannot potentially create noise by contact with other parts?
Is there anything noticeable in relation to the operation of the truck that may affect the sound test results?

Table 16

Item	Yes	No	N/A	Comments
Payload
Payload Calibrated
Target Payload 211 - 224 t (232 - 247 tn)
Actual Payload - Read From VIMS in Cab

Table 17

Item	Yes	No	N/A	Comments
Machine Configuration Testing at the Test Area  (1)
1750 rpm (2)
Fan 70 per cent (3)

( 1 )	Engine rpm technician is to ride in the cab to ensure correct setup when operating truck
( 2 )	Technician in cab to view
( 3 )	Go to E.T. - Diagnostic/Diagnostic Then, Select Override Parameters. 0 per cent for Maximum Fan Speed, 100 per cent for Minimum Fan Speed. A 30 per cent override should give 70 per cent of Maximum Fan Speed.

Table 18

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

( 4 )

If rpm is out of range, retest

Table 19

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 20

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 21

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 22

Item	Yes	No	N/A	Comments
Cab Testing - Engine at Rated Engine Speed, Air Conditioner on HI, Radio Off, Windows Closed
Temperature (C) (5)
Wind Speed (m/s) (5)
Barometric Pressure (hPa) (5)
Relative Humidity (%) (5)
Test Results (Three Passes)	Uphill	Downhill
Uphill, First Gear, Loaded, at 1750 rpm
Uphill, First Gear, Loaded, at 1750 rpm
Uphill, First Gear, Loaded, at 1750 rpm

( 5 )

Recorded by Global Acoustics

Procedure to Set and Adjust the Fan Speed

1. Unplug the fan solenoid

2. Start the engine. Take Machine to HI idle. Measure the fan speed with the 9U-7402 Multitach Tool Gp .

3. Multiply the maximum fan speed multiply by 0.7. The number is the 70 per cent fan speed. Example: Maximum fan speed is 630 rpm. 630 X 0.7 = 440 rpm

4. Connect the fan solenoid.

5. Set the fan to the specified RPM from Step 3. Use ET to adjust the voltage in the over ride setting to the proper setting. Ensure that the laptop is left on with the screen open in order to ensure that the laptop does not go into sleep mode.

6. Test the machine at MACHINES RATED (see specific machine rated engine speed) rpm for the test (approximately 30min).

7. After the test is completed, reassemble the machine. Check that the fan operates correctly.

Download the following information from VIMS/ET:

• Suspension Cylinder Pressures

• Payloads

• Boost Pressure

• Left Hand Exhaust Temperature minus (-) Right Hand Exhaust Temperature

• Ambient Air Temperature

• Coolant Temperature

Note: All sound testing is to be downloaded within 24 hours to the Field Service Coordinator or Mark Standing, Sound project Coordinator.

793F XQ Test Sheet

Table 23

Machine Data
Date		Machine Serial Number
Machine Model		Machine Location
Machine Hours		Technician's Name

Illustration 14	g02735258

Table 24

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (1)
Panel (2)
Panel (3)
Panel (4)
Panel (5)
Panel (6)
Panel (7)

Illustration 15	g02735262

Table 25

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (8)
Panel (10)
Panel (11)
Panel (12)
Panel (13)
Panel (14)

Illustration 16	g02735368

Illustration 17	g02735370

Table 26

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (15)
Panel (16)
Panel (17)
Panel (18)
Three Guards (19)
Panel (20)
Panel (21)
Panel (22)
Panel Assembly Under Guards (19)
Access Doors (16), (17), and (21) are Closed and Latched

Illustration 18	g02747216

Table 27

Item	Yes	No	N/A	Comments
Louver Group
Silencers (23)

Illustration 19	g02747276

Table 28

Item	Yes	No	N/A	Comments
Torque Converter Group
Torque Converter Section (24)
Torque Converter Section (25)

Illustration 20	g02747277

Table 29

Item	Yes	No	N/A	Comments
Torque Converter Group
Cover Assembly (26) on Side of the Torque Converter
Cover Assembly (27)
Cover Assembly (28)
Cover Assembly (28A)

Illustration 21	g02747278

Table 30

Item	Yes	No	N/A	Comments
Transmission Insulation Group
Insulation Wraps (29) on and Secure
Insulation Wraps (30) on and Secure

Illustration 22	g02747280

Table 31

Item	Yes	No	N/A	Comments
Rear Cover Group
Rear Cover (31)

Illustration 23	g02749616

Table 32

Item	Yes	No	N/A	Comments
Engine Group Left Side
Block Cover (32)
Block Cover (33)
Block Cover (34)
Oil Pan Cover (35)
Oil Pan Cover (36)
Oil Pan Cover (37)
Two Oil Pan Covers (38)
Oil Pan Cover (39)

Illustration 24	g02749617

Table 33

Item	Yes	No	N/A	Comments
Engine Group Right Side
Block Cover (40)
Block Cover (41)
Block Cover (42)
Oil Pan Cover (43)
Two Oil Pan Covers (44)
Oil Pan Cover (45)

Illustration 25	g02749637

Table 34

Item	Yes	No	N/A	Comments
Muffler Group
Muffler Cover (46)
Muffler Cover (47)
Muffler Cover (48)
Muffler Cover (49)
Muffler Cover (50)
Exhaust Leaks
Turbo Leaks

Illustration 26	g02750938

Table 35

Item	Yes	No	N/A	Comments
Engine Hood Group with Silencers Attached
Six Silencers (51)
Silencer (52)
Two Silencers (53)
Silencer (54)
Silencer (55)
Silencer (56)
Silencer (57)
Silencer (58)
Silencer (59)
Silencer (60)
Silencer (61)
Silencer (62)
Silencer (63)
Silencer (64)
All Hoods Latched Securely

Illustration 27	g02791552

Table 36

Item	Yes	No	N/A	Comments
Truck Body
Two Silencers (65)
Two Silencers (66)
Five Silencers (67)
Silencer (68)

Table 37

Item	Yes	No	N/A	Comments
Tire Group	LH	RH
Air Pressure
Condition of Tires - no flaps of rubber present that could create additional noise
Size of Front Tires
Size of Rear Tires
Suspension Groups	LH	RH
Pressure - Front
Pressure - Rear
Suspension Group Height - Front 254 ± 13 mm (10.0 ± 0.5 inch)
Suspension Group Height - Rear 203 ± 13 mm (8.0 ± 0.5 inch)
General	Yes	No	N/A
Are Handrails in place and secure - no cracks, latched in holding position?
Are mirrors secure - all fasteners in place and tight?
Are lights, Reverse and others, secure - all fasteners in place and tight?
Are unit numbers on the chassis and body secure - no cracks, all fasteners in place?
Check rock ejector clearance, cannot impact final drive, or rim to potentially create noise.
Are mud flaps in place and clearance OK, cannot potentially create noise by contact with other parts?
Is there anything noticeable in relation to the operation of the truck that may affect the sound test results?

Table 38

Item	Yes	No	N/A	Comments
Payload
Payload Calibrated
Target Payload 211 - 224 t (232 - 247 tn)
Actual Payload - Read From VIMS in Cab

Table 39

Item	Yes	No	N/A	Comments
Machine Configuration Testing at the Test Area  (1)
1750 rpm (2)
Fan 70 per cent (3)

( 1 )	Engine rpm technician is to ride in the cab to ensure correct setup when operating truck
( 2 )	Technician in cab to view
( 3 )	Go to E.T. - Diagnostic/Diagnostic Then, Select Override Parameters. 0 per cent for Maximum Fan Speed, 100 per cent for Minimum Fan Speed. A 30 per cent override should give 70 per cent of Maximum Fan Speed.

Table 40

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

( 4 )

If rpm is out of range, retest

Table 41

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 42

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 43

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 44

Item	Yes	No	N/A	Comments
Cab Testing - Engine at Rated Engine Speed, Air Conditioner on HI, Radio Off, Windows Closed
Temperature (C) (5)
Wind Speed (m/s) (5)
Barometric Pressure (hPa) (5)
Relative Humidity (%) (5)
Test Results (Three Passes)	Uphill	Downhill
Uphill, First Gear, Loaded, at 1750 rpm
Uphill, First Gear, Loaded, at 1750 rpm
Uphill, First Gear, Loaded, at 1750 rpm

( 5 )

Recorded by Global Acoustics

Procedure to Set and Adjust the Fan Speed

1. Unplug the fan solenoid

2. Start the engine. Take Machine to HI idle. Measure the fan speed with the 9U-7402 Multitach Tool Gp .

3. Multiply the maximum fan speed multiply by 0.7. The number is the 70 per cent fan speed. Example: Maximum fan speed is 630 rpm. 630 X 0.7 = 440 rpm

4. Connect the fan solenoid.

5. Set the fan to the specified RPM from Step 3. Use ET to adjust the voltage in the over ride setting to the proper setting. Ensure that the laptop is left on with the screen open in order to ensure that the laptop does not go into sleep mode.

6. Test the machine at MACHINES RATED (see specific machine rated engine speed) rpm for the test (approximately 30min).

7. After the test is completed, reassemble the machine. Check that the fan operates correctly.

Download the following information from VIMS/ET:

• Suspension Cylinder Pressures

• Payloads

• Boost Pressure

• Left Hand Exhaust Temperature minus (-) Right Hand Exhaust Temperature

• Ambient Air Temperature

• Coolant Temperature

Note: All sound testing is to be downloaded within 24 hours to the Field Service Coordinator or Mark Standing, Sound project Coordinator.

797F XQ Test Sheet

Table 45

Machine Data
Date		Machine Serial Number
Machine Model		Machine Location
Machine Hours		Technician's Name

Illustration 28	g02787200

Table 46

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (1)
Panel (2)
Panel (3)
Panel (4)
Panel (5)
Panel (6)
Panel (7)
Panel (8)
Panel (9)
Panel (10)

Illustration 29	g02787237

Table 47

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (11)
Panel (12)
Panel (13)
Panel (14)
Panel (15)
Panel (16)
Panel (17)
Panel (18)

Illustration 30	g02787356

Table 48

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (19)
Panel (20)
Panel (21)
Panel (22)
Panel (23)
Panel (24)
Panel (25)
Panel (26)
Panel (27)

Illustration 31	g02787476

Table 49

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (28)
Panel (29)
Panel (30)
Panel (31)
Panel (32)
Three Guards (33)
Access Door (34)
Panel (35)
Panel (36)
Panel Assembly with Insulation is Above the Three Guards (33)
Access Doors (32), and (34) are Closed and Latched

Illustration 32	g02787497

Table 50

Item	Yes	No	N/A	Comments
Engine Bay Panels with Silencers Attached
Panel (37)
Panel (38)
Panel (39)
Access Door (38) is Closed and Latched

Illustration 33	g02788662

Table 51

Item	Yes	No	N/A	Comments
Louver Group
Silencers (40)

Illustration 34	g02788696

Table 52

Item	Yes	No	N/A	Comments
Torque Converter Group
Cover Assembly (41)
Cover Assembly (42)
Cover Assembly (43)
Cover Assembly (44)
Cover Assembly (45)
Cover Assembly (46)
Cover Assembly (47)

Illustration 35	g02788701

Table 53

Item	Yes	No	N/A	Comments
Torque Converter Group
Silencer (48)
Silencer (49)
Silencer (50)
Silencer (51)
Silencer (52)
Silencer (53)
Silencer (54)

Illustration 36	g02788707

Table 54

Item	Yes	No	N/A	Comments
Rear Cover Group
Silencer (55)

Illustration 37	g02788711

Table 55

Item	Yes	No	N/A	Comments
Rear Axle Housing Group
Cover Assembly (56)
Cover Assembly (57)
Cover Assembly (58)
Cover Assembly (58A)

Illustration 38	g02789681

Table 56

Item	Yes	No	N/A	Comments
Engine Group Left Side
Block Cover (59)
Block Cover (60)
Block Cover (61)
Block Cover (62)
Block Cover (63)
Block Cover (64)
Cover Assembly (65)
Access Panel Assembly (66)
Cover Assembly (67)
Cover Assembly (68)
Access Panel Assembly (69)

Illustration 39	g02789705

Table 57

Item	Yes	No	N/A	Comments
Engine Group Right Side
Block Cover (70)
Block Cover (71)
Block Cover (72)
Block Cover (73)
Block Cover (74)
Cover Assembly (75)
Access Panel Assembly (76)
Cover Assembly (77)
Access Panel Assembly (78)
Cover Assembly (79)
Cover Assembly (80)

Illustration 40	g02790307

Table 58

Item	Yes	No	N/A	Comments
Muffler Group
Muffler Cover (81)
Muffler Cover (82)
Muffler Cover (83)
Muffler Cover (84)
Exhaust leaks
Turbo Leaks

Illustration 41	g02791545

Table 59

Item	Yes	No	N/A	Comments
Engine Hood with Silencers Attached
Two Silencers (85)
Six Silencers (86)
Seven Silencers (87)
Four Silencers (88)
Nine Silencers (89)
Silencer (90)
Two Silencers (91)
Silencer (92)
Silence (93)
Silencer (94)
Silencer (95)
Silencer (96)
Silencer (97)
Silencer (98)
Silencer (99)
Silencer (100)
All Hoods Latched Securely

Illustration 42	g02791550

Table 60

Item	Yes	No	N/A	Comments
Truck Body
Eleven Silencers (101)
Five Silencers (102)
Four Silencers (103)
Two Silencers (104)
Two Silencers (105)

Table 61

Item	Yes	No	N/A	Comments
Tire Group	LH	RH
Air Pressure
Condition of Tires - no flaps of rubber present that could create additional noise
Size of Front Tires
Size of Rear Tires
Suspension Groups	LH	RH
Pressure - Front
Pressure - Rear
Suspension Group Height - Front 254 ± 13 mm (10.0 ± 0.5 inch)
Suspension Group Height - Rear 203 ± 13 mm (8.0 ± 0.5 inch)
General	Yes	No	N/A
Are Handrails in place and secure - no cracks, latched in holding position?
Are mirrors secure - all fasteners in place and tight?
Are lights, Reverse and others, secure - all fasteners in place and tight?
Are unit numbers on the chassis and body secure - no cracks, all fasteners in place?
Check rock ejector clearance, cannot impact final drive, or rim to potentially create noise.
Are mud flaps in place and clearance OK, cannot potentially create noise by contact with other parts?
Is there anything noticeable in relation to the operation of the truck that may affect the sound test results?

Table 62

Item	Yes	No	N/A	Comments
Payload
Payload Calibrated
Target Payload 352- 374 t (388- 412 tn)
Actual Payload - Read From VIMS in Cab

Table 63

Item	Yes	No	N/A	Comments
Machine Configuration Testing at the Test Area  (1)
1750 rpm (2)
Fan 70 per cent (3)

( 1 )	Engine rpm technician is to ride in the cab to ensure correct setup when operating truck
( 2 )	Technician in cab to view
( 3 )	Go to E.T. - Diagnostic/Diagnostic Then, Select Override Parameters. 0 per cent for Maximum Fan Speed, 100 per cent for Minimum Fan Speed. A 30 per cent override should give 70 per cent of Maximum Fan Speed.

Table 64

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

( 4 )

If rpm is out of range, retest

Table 65

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 66

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 67

Item	Yes	No	N/A	Comments
Stationary - Engine at Rated Engine Speed 1730 - 1770 rpm (4)
Dynamic Uphill - In First Gear, Loaded, at 1730 - 1770 rpm (4)
Dynamic Down Hill - In Fourth Gear, Unloaded, Retarder Engaged at 22 km/h (14.0 mph), at 1730 - 1770 rpm (4)

Table 68

Item	Yes	No	N/A	Comments
Cab Testing - Engine at Rated Engine Speed, Air Conditioner on HI, Radio Off, Windows Closed
Temperature (C) (5)
Wind Speed (m/s) (5)
Barometric Pressure (hPa) (5)
Relative Humidity (%) (5)
Test Results (Three Passes)	Uphill	Downhill
Uphill, First Gear, Loaded, at 1750 rpm
Uphill, First Gear, Loaded, at 1750 rpm
Uphill, First Gear, Loaded, at 1750 rpm

( 5 )

Recorded by Global Acoustics

Procedure to Set and Adjust the Fan Speed

1. Unplug the fan solenoid

2. Start the engine. Take Machine to HI idle. Measure the fan speed with the 9U-7402 Multitach Tool Gp .

3. Multiply the maximum fan speed multiply by 0.7. The number is the 70 per cent fan speed. Example: Maximum fan speed is 630 rpm. 630 X 0.7 = 440 rpm

4. Connect the fan solenoid.

5. Set the fan to the specified RPM from Step 3. Use ET to adjust the voltage in the over ride setting to the proper setting. Ensure that the laptop is left on with the screen open in order to ensure that the laptop does not go into sleep mode.

6. Test the machine at MACHINES RATED (see specific machine rated engine speed) rpm for the test (approximately 30min).

7. After the test is completed, reassemble the machine. Check that the fan operates correctly.

Download the following information from VIMS/ET:

• Suspension Cylinder Pressures

• Payloads

• Boost Pressure

• Left Hand Exhaust Temperature minus (-) Right Hand Exhaust Temperature

• Ambient Air Temperature

• Coolant Temperature

Note: All sound testing is to be downloaded within 24 hours to the Field Service Coordinator or Mark Standing, Sound project Coordinator.