992G Wheel Loader and 854G Wheel Dozer Braking System Piston Pump (Brake) Caterpillar


Piston Pump (Brake)
`
1.1. Specifications for a Bench Test
2.1. Specifications for a Machine Test
3.1. Pressure compensator Valve (Brake)



Illustration 1g00100423

Side view of the brake pump




Illustration 2g00100424

End view of the brake pump

The rotation of the shaft is counterclockwise when the rotation of the shaft is viewed from the drive end.

Type of pump ... Load Sensing Variable Displacement Piston Pump

Note: The directional arrow in Illustration 2 indicates the direction of the shaft rotation.

(1) 4T-1916 Spring

Length under test force ... 42.06 mm (1.656 inch)
Test force ... 65.0 ± 6.5 N (14.61 ± 1.46 lb)
Free length after test ... 54.1 mm (2.13 inch)
Outside diameter ... 18.42 mm (.725 inch)

(2) Torque for the four screws ... 23 ± 2 N·m (17 ± 1 lb ft)

(3) Torque for the four bolts ... 38 ± 4 N·m (28 ± 3 lb ft)

Specifications for a Bench Test

For the test, use SAE 10 oil that is at 46 ± 3°C (115 ± 5°F).

Test at full speed:

Output ... 40 L/min (10.6 US gpm)
Pressure ... 690 kPa (100 psi)
Pump speed ... 2200 rpm
Engine speed ... 1750 rpm
Output ... 38 L/min (10 US gpm)
Pressure ... 6900 kPa (1000 psi)
Pump speed ... 2200 rpm
Engine speed ... 1750 rpm

Test at half speed:

Output ... 20 L/min (5.3 US gpm)
Pressure ... 690 kPa (100 psi)
Pump speed ... 1100 rpm
Engine speed ... 875 rpm
Output ... 19 L/min (5 US gpm)
Pressure ... 6900 kPa (1000 psi)
Pump speed ... 1100 rpm
Engine speed ... 875 rpm

Specifications for a Machine Test

For the test, use SAE 10 oil that is at 46 ± 3°C (115 ± 5°F).

Test at full speed:

Output ... 35 L/min (9.2 US gpm)
Pressure ... 690 kPa (100 psi)
Pump speed ... 1883 rpm
Engine speed ... 1750 rpm
Output ... 34 L/min (9 US gpm)
Pressure ... 6900 kPa (1000 psi)
Pump speed ... 1883 rpm
Engine speed ... 1750 rpm

Test at half speed:

Output ... 17.5 L/min (4.6 US gpm)
Pressure ... 690 kPa (100 psi)
Pump speed ... 942 rpm
Engine speed ... 875 rpm
Output ... 17 L/min (4.5 US gpm)
Pressure ... 6900 kPa (1000 psi)
Pump speed ... 942 rpm
Engine speed ... 875 rpm

Pressure compensator Valve (Brake)




Illustration 3g00013108

Pressure setting for the pressure and flow compensator valve ... 16000 ± 345 kPa (2320 ± 50 psi)

(1) 3G-5423 Spring

Length under test force ... 34.11 mm (1.343 inch)
Test force ... 555 ± 58 N (125 ± 13 lb)
Free length after test ... 39.88 mm (1.570 inch)
Outside diameter ... 16.08 mm (.633 inch)

(2) Torque for the nut ... 9 ± 1 N·m (80 ± 9 lb in)

Note: When you tighten nut (2), hold setscrew (3) .

Information System:

D6M Track-Type Tractor Starting with Auxiliary Start Receptacle
D6M Track-Type Tractor Product Identification Number, Serial Number and EU's CE Plate Locations
D6M Track-Type Tractor Model View Illustrations
D5M Track-Type Tractor Towing the Machine
D6M Track-Type Tractor Lifting and Tying Down the Machine
D5M Track-Type Tractor Changing Direction and Speed
D5M Track-Type Tractor After Starting Engine
D6M Track-Type Tractor Starting Below 0°C (32°F)
561M Pipelayer Engine Starting with Jump Start Cables
D6M Track-Type Tractor Starting Above 0°C (32°F)
992G Wheel Loader and 854G Wheel Dozer Braking System Parking Brake
D6M Track-Type Tractor Bulldozer Blade Lift Control
322B, 322B L, 325B and 325B L Excavators Fire Prevention and Explosion Prevention
928G Wheel Loader Crushing Prevention and Cutting Prevention
992G Wheel Loader Electrohydraulic System Hydraulic Tank (Implement, Hydraulic Fan)
928G Wheel Loader Equipment Lowering with Engine Stopped
924Gz Wheel Loader General Hazard Information
IT62G Integrated Toolcarrier and 950G and 962G Wheel Loaders Battery Disconnect Switch
966G and 972G Wheel Loaders Engine Start Switch
416C, 426C, 428C, 436C and 438C Backhoe Loaders Seat Belt
928G Wheel Loader Warning Signs and Labels
854G Wheel Dozer Hydraulic System Piston Motor (Hydraulic Fan)
966G and 972G Wheel Loaders Directional Turn Signal and Hazard Flasher Control - If Equipped
416C, 426C, 428C, 436C and 438C Backhoe Loaders Fire Prevention and Explosion Prevention