267, 277 and 287 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

• 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

ENGINE IDLE
TEST	SPECIFICATION ( 267)	SPECIFICATION ( 277 and 287)	ACTUAL
High Idle	2820 ± 50 RPM	2900 ± 50 RPM
Low Idle	1000 ± 50 RPM	1000 ± 50 RPM

Table 3

LIFT CYLINDER SPEED TEST
LIFT'S DIRECTION	TIME (sec) ( 267 and 277)	TIME (sec) ( 287)	ACTUAL
Raise	2.7 ± 0.2	4.8 ± 0.2
Lower	2.7 ± 0.2	3.4 ± 0.2
Float	2.8 ± 0.2	3.4 ± 0.2

Table 4

TILT CYLINDER SPEED TEST
TILT'S DIRECTION	TIME (sec) ( 267 and 277)	TIME (sec) ( 287)	ACTUAL
Tilt Forward	2.0 ± 0.2	2.1 ± 0.2
Tilt Back	1.6 ± 0.2	1.6 ± 0.2

Table 5

LIFT CYLINDER DRIFT
BUCKET LOAD	TIME	MAXIMUM DRIFT	ACTUAL
200 kg	1 min	3mm

Table 6

TILT CYLINDER DRIFT
BUCKET LOAD	TIME	MAXIMUM DRIFT	ACTUAL
200 kg	1 min	3 mm

Table 7

PILOT SYSTEM PRESSURE TEST
TEST	LOW IDLE		HIGH IDLE
	SPECIFICATION	ACTUAL	SPECIFICATION	ACTUAL
Engine Speed	1000 ± 50 RPM		2820 ± 50 RPM ( 267) 2900 ± 50 RPM ( 277 and 287)
Charge Pressure	3200 ± 200 kPa (465 ± 30 psi)		3800 ± 345 kPa (550 ± 50 psi)
Speed Sensing Pressure	900 ± 200 kPa (130 ± 30 psi)		3200 ± 100 kPa (465 ± 15 psi)
Pilot Pressure			3500 ± 200 kPa (510 ± 30 psi)

Table 8

MAIN RELIEF VALVE PRESSURE
TEST	Specification ( 267)	Specification ( 277 and 287)	ACTUAL
High Idle	2820 ± 50 RPM	2900 ± 50 RPM
Main Relief	23000 ± 700 kPa (3340 ± 100 psi)	23000 ± 700 kPa (3340 ± 100 psi)

Table 9

LINE RELIEF VALVE PRESSURE
TEST		Specification ( 267)	Specification ( 277 and 287)	ACTUAL
High Idle		2820 ± 50 RPM	2900 ± 50 RPM
Lift Cylinder RAISE		27600 ± 700 kPa (4000 ± 100 psi)	27600 ± 700 kPa (4000 ± 100 psi)
Tilt Cylinder FORWARD		24500 ± 700 kPa (3560 ± 100 psi)	24500 ± 700 kPa (3560 ± 100 psi)
Tilt Cylinder RACK BACK		27600 ± 700 kPa (4000 ± 100 psi)	27600 ± 700 kPa (4000 ± 100 psi)
Auxiliary		25000 ± 700 kPa (3630 ± 100 psi)	25000 ± 700 kPa (3630 ± 100 psi)

Table 10

BASELINE FOR THE HYDROSTATIC SYSTEM
TEST	LOW IDLE		HIGH IDLE
	SPECIFICATION	ACTUAL	SPECIFICATION	ACTUAL
Engine Speed	1000 ± 50 RPM		2820 ± 50 RPM ( 267) 2900 ± 50 RPM ( 277 and 287)
Charge Pressure	3200 ± 200 kPa (465 ± 30 psi)		3800 ± 345 kPa (550 ± 50 psi)
Speed Sensing Pressure	900 ± 200 kPa (130 ± 30 psi)		3200 ± 100 kPa (465 ± 15 psi)
Pressure for the Pump Case	100 ± 50 kPa (15 ± 7 psi)		200 ± 100 kPa (30 ± 15 psi)
Fan Speed	1225 ± 25 RPM		2850 ± 50 RPM ( 267) 2450 ± 50 RPM ( 277 and 287)

Table 11

HYDROSTATIC SYSTEM TESTS
STALL TEST
TEST	SPECIFICATION	ACTUAL
Engine Stall Speed	2200 ± 500 RPM
MA Pressure Pump 1	38200 ± 2000 kPa (5540 ± 290 psi)
MA Pressure Pump 2	38200 ± 2000 kPa (5540 ± 290 psi)
DOUBLE STALL TEST
TEST	SPECIFICATION	ACTUAL
Engine Stall Speed	2000 ± 500 RPM
MA Pressure Pump 1	35000 ± 3000 kPa (5080 ± 435 psi)
MA Pressure Pump 2	35000 ± 3000 kPa (5080 ± 435 psi)
NEUTRAL SETTING for PISTON PUMP
TEST	SPECIFICATION	ACTUAL
Engine Speed	1000 ± 50 RPM
MA Pressure Pump 1	3500 ± 500 kPa (510 ± 75 psi)
MA Pressure Pump 2	3500 ± 500 kPa (510 ± 75 psi)
MAXIMUM RUNOUT
TEST	SPECIFICATION	ACTUAL
Engine Speed	2820 ± 50 RPM ( 267) 2900 ± 50 RPM ( 277 and 287)
Speed Sensing Pressure	3200 ± 100 kPa (465 ± 15 psi)
MA Pressure Pump 1	6000 ± 500 kPa (870 ± 75 psi)
MA Pressure Pump 2	6000 ± 500 kPa (870 ± 75 psi)
Sprocket Speed	150 ± 3 for the 267 155 ± 3 for the 277 and 287 (2)
MAXIMUM DISPLACEMENT STOP TEST
TEST	SPECIFICATION	ACTUAL
Engine Speed	2820 ± 50 RPM ( 267) 2900 ± 50 RPM ( 277 and 287)
Drift	3 m (10 ft)
BRAKE TEST
TEST	SPECIFICATION	ACTUAL
Engine Speed	1000 ± 50 RPM
Pilot Line Pressure	3200 ± 100 kPa (465 ± 15 psi)

( 2 )

The sprocket speeds must be within 2 RPM of each other.