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Service and Repair Manual
April 2017
Manifolds
70
GTH-1056
Part No. 1278145
How t o Set t he Par ki ng Br ake System Pr ess ure
How to Set the Parking Brake
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 450 ±25 psi
/ 31 ±1.7 bar. The pump is functioning
correctly.
Result: The pressure gauge fails to read 450
±25 psi / 31 ±1.7 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.
5
Install a 0 to 1000 psi / 0 to 100 bar pressure
gauge into test port 'TPB' at the top of the
secondary function manifold, Refer to
Secondary Function Manifold Components.
6
Start the engine. Allow the engine to idle.
Result: The pressure gauge reads 400 psi /
27.5 bar. The pressure setting is correct.
Proceed to step 11.
Result: The pressure gauge fails to read
400 psi / 27.5 bar. 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.
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.
Summary of Contents for GTH-1056
Page 65: ...April 2017 Service and Repair Manual Manifolds Part No 1278145 GTH 1056 55 ...
Page 67: ...April 2017 Service and Repair Manual Manifolds Part No 1278145 GTH 1056 57 ...
Page 69: ...April 2017 Service and Repair Manual Manifolds Part No 1278145 GTH 1056 59 ...
Page 71: ...April 2017 Service and Repair Manual Manifolds Part No 1278145 GTH 1056 61 ...
Page 73: ...April 2017 Service and Repair Manual Manifolds Part No 1278145 GTH 1056 63 ...
Page 75: ...April 2017 Service and Repair Manual Manifolds Part No 1278145 GTH 1056 65 ...
Page 128: ...Service and Repair Manual April 2017 118 Harness Map Control System Ground Single Joystick ...
Page 129: ...April 2017 Service and Repair Manual 119 Harness Map Control System Dual Joystick ...
Page 132: ...Service and Repair Manual April 2017 122 Harness Map Deutz 3 6TCD T4F Engine ...
Page 133: ...April 2017 Service and Repair Manual 123 Harness Map Perkins 1204 T4F Engine ...
Page 135: ...April 2017 Service and Repair Manual Part No 1278145 GTH 1056 125 Harness Map Work Lights ...
Page 136: ...Service and Repair Manual April 2017 126 Harness Map Work Lights ...
Page 137: ...April 2017 Service and Repair Manual 127 Harness Map Road Lights ...
Page 138: ...Service and Repair Manual April 2017 128 GTH 1056 Part No 1278145 Harness Map Road Lights ...
Page 140: ...Service and Repair Manual April 2017 130 Harness Map Enclosed Cab with Heat ...
Page 141: ...April 2017 Service and Repair Manual 131 Harness Map Enclosed Cab with HVAC ...
Page 145: ...April 2017 Service and Repair Manual 135 Electrical Schematic ...
Page 146: ...Service and Repair Manual April 2017 136 GTH 1056 Part No 1278145 Electrical Schematic ...
Page 147: ...April 2017 Service and Repair Manual Part No 1278145 GTH 1056 137 Electrical Schematic ...
Page 148: ...Service and Repair Manual April 2017 138 Electrical Schematic ...
Page 149: ...April 2017 Service and Repair Manual 139 Hydraulic Schematic Models with Single Joystick ...
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