April 2018
Service and Repair Manual
Manifolds
Part No. 1287209GT
GTH-636
47
6 Start the engine. Allow the engine to idle.
Result: The pressure gauge reads 350 psi /
24.1. The pressure setting is correct. Proceed
to step 11.
Result: The pressure gauge fails to read 350
psi / 24.1. The pressure setting needs to be
adjusted. Proceed to step 7.
7 Turn the machine off. Hold the brake pressure
reducing/relief valve with a wrench and
remove the cap (schematic item PR4).
8 Adjust the internal hex socket. Turn it
clockwise to increase the pressure or
counterclockwise to decrease the pressure.
Component damage hazard. Do
not adjust the relief valve
pressures higher than
specifications.
9 Install the relief valve cap.
10 Repeat this procedure beginning with step 6.
11 Turn the machine off. Remove the pressure
gauge from the test port.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
How to Set the Differ enti al Lock System Pressure
How to Set the Differential Lock
System Pressure
Note: Be sure that the hydraulic oil level is visible in
the inspection glass of the hydraulic tank.
1 Install a 0 to 1000 psi / 0 to 100 bar pressure
gauge into test port 'TP' at the top of the
primary function manifold, Refer to Primary
Function Manifold Components.
2 Start the engine. Allow the engine to idle after
warming the engine to operating temperature.
3 Without operating any machine controls,
observe the reading on the pressure gauge.
Result: The pressure gauge reads 650 ±20 psi
/ 44.8 ±1.4 bar. The pump is functioning
correctly.
Result: The pressure gauge fails to read 650
±20 psi / 44.8 ±1.4 bar. The pressure setting
needs to be adjusted. Refer to Repair
Procedure,
How to Adjust the Function Pump
Pressure
.
4 Turn the machine off. Remove the pressure
gauge from the test port.
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
Содержание GTH-636
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