Service and Repair Manual
April 2017
Hydraulic Pump
46
GTH-844
Part No. 1272854
How t o Adj ust t he Functi on Pump St andby Pr ess ure
How to Adjust the Function Pump
Standby Pressure
1
Connect a 0 to 1000 psi / 0 to 100 bar
pressure gauge to test port 'TP' on the primary
function manifold. See 7-1 or 7-2, Primary
Function Manifold Components.
2
Start the engine and allow the engine to run at
low idle.
3
Observe the pressure reading on the pressure
gauge.
Result: The pressure gauge reads 450 ±25 psi
/ 31 ±1.7 bar. The pump is functioning correctly.
Proceed to step 6.
Result: The pressure gauge fails to read 450
±25 psi / 31 ±1.7 bar. The pressure setting
needs to be adjusted. Proceed to step 4.
4
Loosen the set screw for the standby pressure
adjustment screw.
5
Adjust the function pump standby pressure.
Turn the adjustment screw clockwise to
increase the pressure or counterclockwise to
decrease the pressure. Tighten the set screw.
1 Standby Pressure Adjustment
2 Pressure compensator adjustment
6
Turn the engine off and remove the pressure
gauge.
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-844
Page 12: ......
Page 61: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 49...
Page 63: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 51...
Page 65: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 53...
Page 67: ...April 2017 Service and Repair Manual Manifolds Part No 1272854 GTH 844 55...
Page 151: ...April 2017 Service and Repair Manual 139 Harness Map Options Work Lights to 15 21456...
Page 155: ...April 2017 Service and Repair Manual 143 Harness Map Options Road Lights to 15 21456...
Page 159: ...April 2017 Service and Repair Manual 147 Harness Map Options Enclosed Cab with Heater...
Page 162: ...Service and Repair Manual April 2017 150 Harness Map Options Enclosed Cab with HVAC...
Page 163: ...April 2017 Service and Repair Manual 151 Electrical Schematic View 1 to 15 20661...
Page 166: ...Service and Repair Manual April 2017 154 Electrical Schematic View 2 to 15 20661...
Page 167: ...April 2017 Service and Repair Manual 155 Electrical Schematic View 1 from 15 20662 to 21456...
Page 170: ...Service and Repair Manual April 2017 158 Electrical Schematic View 2 from 15 20662 to 21456...
Page 171: ...April 2017 Service and Repair Manual 159 Electrical Schematic View 1 from 15 21457 to 21535...
Page 174: ...Service and Repair Manual April 2017 162 Electrical Schematic View 2 from 15 21457 to 21535...
Page 175: ...April 2017 Service and Repair Manual 163 Electrical Schematic View 1 from 15 21536 16E 10000...
Page 178: ...Service and Repair Manual April 2017 166 Electrical Schematic View 2 from 15 21536 16E 10000...
Page 179: ...April 2017 Service and Repair Manual 167 Hydraulic Schematic Single Joystick to 19528...
Page 183: ...April 2017 Service and Repair Manual 171 Hydraulic Schematic Dual Joystick to 19528...