247B and 257B Multi Terrain Loaders Machine Systems Caterpillar

The following tables are provided in order to record information as you perform the tests on the machine. Make copies of these tables so that the tables may be reused for other machines.

The worksheets are designed to be used for the following pressure tests:

• Engine idle

• Cycle times

• Drift checks

• Baseline for the hydrostatic system

• Pump flow test

• Pilot system

• Main relief valves

• Line relief valves

• Hydrostatic system

Troubleshooting Worksheets

The following tables are provided in order to record information as you perform the tests on the machine.

Table 1

MACHINE MODEL		DATE
SERIAL NUMBER		SERVICE METER HOURS
ENGINE SERIAL NUMBER		ARRANGEMENT NUMBER

Table 2

TRAVEL TIME (SPEED) FOR THE LIFT CYLINDER
Position of the Hydraulic Control	TIME (sec)		ACTUAL
	247B	257B
Raise	2.7 ± 0.5	4.8 ± 0.5
Lower	2.7 ± 0.5	3.4 ± 0.5
Float	2.8 ± 0.5	3.6 ± 0.5

Table 3

TRAVEL TIME (SPEED) FOR THE TILT CYLINDER
Position of the Hydraulic Control	TIME (sec)		ACTUAL
Tilt Forward	2.1 ± 0.5
Tilt Back	1.6 ± 0.5

Table 4

LIFT CYLINDER DRIFT
LOAD	TIME	MAXIMUM DRIFT	ACTUAL
200 kg (440 lb)	1 min	3 mm (0.118 inch)

Table 5

TILT CYLINDER DRIFT
LOAD	TIME	MAXIMUM DRIFT	ACTUAL
200 kg (440 lb)	1 min	3 mm (0.118 inch)

Table 6

ENGINE IDLE
TEST	Specification		ACTUAL
High Idle	3195 ± 65 RPM
Low Idle	1350 ± 50 RPM

Table 7

BASELINE FOR THE HYDROSTATIC SYSTEM
Oil Temperature Range 45° ± 5°C (113° ± 9°F)
TEST	LOW IDLE		Group 1: 247B/ 257B (1) 2800 ± 10 RPM Group 2 247B/ 257B 2550 ± 25 RPM
	SPECIFICATION	ACTUAL	SPECIFICATION	ACTUAL
Charge Pressure	3100 ± 200 kPa (450 ± 29 psi)		247B/ 257B Group 1 3260 ± 200 kPa (473 ± 29 psi) (2) 247B/ 257B Group 2 3225 ± 200 kPa (468 ± 29 psi)
Speed Sensing Pressure	247B/ 257B Group 1 N/A 247B/ 257B Group 2 900 ± 200 kPa (131 ± 29 psi)		247B/ 257B Group 1 2610 ± 50 kPa (380 ± 8 psi) (2) 247B/ 257B Group 2 2150 ± 150 kPa (312 ± 22 psi)

( 1 )	Group 1 contains 247B(S/N: MTL1-3922) and 257B(S/N: SLK1-5829)Group 2 contains 247B(S/N: MTL3923-Up) and 257B(S/N: SLK5830-Up).
( 2 )	For machines in Group 1, if the hystat pump is replaced with a new 289-6342 Piston Pump or remanufactured 10R-4356 Piston Pump, use the settings for Group 2.

Table 8

BASELINE FOR THE HYDROSTATIC SYSTEM
Oil Temperature Range 45° ± 5°C (113° ± 9°F)
TEST	LOW IDLE		HIGH IDLE
	SPECIFICATION	ACTUAL	SPECIFICATION	ACTUAL
Fan Speed	N/A		247B/ 257B 3400 ± 50 RPM
Demand Fan (if equipped)	N/A		247B/ 257B 2448 ± 50 RPM

Table 9

HYDROSTATIC SYSTEM TESTS
MAXIMUM RUNOUT
HIGH IDLE
Oil Temperature Range 45° ± 5°C (113° ± 9°F)
TEST	SPECIFICATION	ACTUAL
RPM for the left track for standard equipped machines	164 ± 12 RPM
RPM for the right track for standard equipped machines	164 ± 12 RPM
Difference of RPM between tracks	2 RPM maximum
MAXIMUM DISPLACEMENT STOP TEST
HIGH IDLE
TEST	SPECIFICATION	ACTUAL
Drift	3 m (10 ft)
SINGLE STALL TEST
TEST	SPECIFICATION	ACTUAL
Engine Stall Speed	2800± 400 RPM
MB1 Pressure	38300 ± 2000 kPa (5555 ± 290 psi)
MB2 Pressure	38300 ± 2000 kPa (5555 ± 290 psi)
DOUBLE STALL TEST
TEST	SPECIFICATION	ACTUAL
Engine Stall Speed	2400 ± 600 RPM

Table 10

MAIN RELIEF VALVE PRESSURE
HIGH IDLE
TEST	247B/ 257B	ACTUAL
Main Relief	23000 ± 700 kPa (3336 ± 102 psi)

Table 11

LINE RELIEF VALVE PRESSURE (MACHINE TEST)
HIGH IDLE
TEST		Specification	ACTUAL
		247B/ 257B
Lift Cylinder RAISE		23000 ± 700 kPa (3336 ± 102 psi)
Tilt Cylinder FORWARD		23000 ± 700 kPa (3336 ± 102 psi)
Tilt Cylinder RACK BACK		23000 ± 700 kPa (3336 ± 102 psi)
Auxiliary		23000 ± 700 kPa (3336 ± 102 psi)

Table 12

LINE RELIEF VALVE PRESSURE (BENCH TEST)
TEST	Pressure	ACTUAL
Lift Cylinder RAISE	27600 ± 700 kPa (4003 ± 102 psi)
Tilt Cylinder FORWARD	24500 ± 700 kPa (3554 ± 102 psi)
Tilt Cylinder RACK BACK	27600 ± 700 kPa (4003 ± 102 psi)
Auxiliary	24500 ± 700 kPa (3554 ± 102 psi)

Table 13

PILOT SYSTEM PRESSURE TEST
Oil Temperature Range 45° ± 5°C (113° ± 9°F)
TEST	LOW IDLE		Group 1: 247B/ 257B (1) 2800 ± 10 RPM 247B/ 257B Group 2 2550 ± 25 RPM
	SPECIFICATION	ACTUAL	SPECIFICATION	ACTUAL
Charge Pressure	3100 ± 200 kPa (450 ± 29 psi)		247B/ 257B Group 1 3260 ± 200 kPa (473 ± 29 psi) (2) 247B/ 257B Group 2 3225 ± 200 kPa (468 ± 29 psi)
Pilot Pressure	3100 ± 200 kPa (450 ± 29 psi)		247B/ 257B Group 1 3260 ± 200 kPa (473 ± 29 psi) (2) 247B/ 257B Group 2 3225 ± 200 kPa (468 ± 29 psi)

( 1 )	Group 1: 247B (S/N: MTL1-3922), (S/N: MTL1-3922) and 257B (S/N: SLK1-5829) Group 2: 247B (S/N: MTL3923-UP) and 257B (S/N: SLK5830-UP)
( 2 )	For machines in Group 1, if the hystat pump is replaced with a new 289-6342 Piston Pump or remanufactured 10R-4356 Piston Pump, use the settings for Group 2.

Table 14

BRAKE TEST
LOW IDLE
TEST	SPECIFICATION	ACTUAL
Brake Line Pressure	3100 ± 200 kPa (450 ± 29 psi)