MULTIQUIP AR13HA Operation Manual page 29

Forward/Reverse Relief Valves Drive Adjustment
The forward and reverse relief valves (Figure 35) are located
in the hydrostatic pump (not on the manifold block) under plugs
1 and 2 . Plug 2 is located in the same location as plug 1, except
it is on the bottom side of the pump. Relief valve 1 is reverse and
2 is forward .
NOTICE
Axle Pumps supplied after 01/01/2003 DO NOT have
adjustable relief cartridges. The pressure is fixed at 2,900 ±
145 psi. If the relief pressure is not within normal range, the
complete cartridge must be replaced.
1. Clean the area around the cap.
2. Remove the cap.
3. Carefully remove the valve cartridge.
4. Using an allen wrench , remove the top nut (extreme care
must be taken not to loosen existing shims, spring, or valve)
Add or remove shims as required. Adding shims increases
pressure; removing shims lowers pressure. One shim is
equal to approximately 50 psi. Shim P/N is 34538.
5. Install the top nut and install valve in the pump cavity using
extreme care not to bind.
6. Install the valve cap.
7. Re-test pressure, further adjustment may be needed if
pressure is not correct.
RELIEF VALVE
HYDROSTATIC
PUMP
FORWARD
RELIEF VALVE
(PLUG 2)
Figure 35. Adjusting Forward/Reverse
Relief Valves
AR13HA-HAR RIDE-ON TANDEM DRUM ROLLER — OPERATION MANUAL — REV. #10 (06/25/21) — PAGE 29
AR13HA-HAR RIDE-ON ROLLER — MAINTENANCE
REVERSE
(PLUG 1)
Steering Relief Valve Pressure Adjustment
To adjust the relief valve steering pressure perform the following:
1. Insert an 8 mm allen wrench into steering relief port 4
(Figure 36) on the manifold block.
2. On the manifold, connect at 5,000 psi pressure gauge into
quick disconnect test port 1 .
3. Start the engine and run at full throttle.
4. Turn the steering wheel to the left or right (maximum) and
hold. Read the steering relief pressure. The relief pressure
reading for the steering test port 1 will should be 700 psi.
5. If the steering relief pressure is not 700 psi, using the allen
wrench adjust the pressure at port 4 until the pressure
gauge reads 500 psi.
Figure 36. Steering and Vibration Relief Valves
Vibration Relief Valve Pressure Adjustment
1. Insert an 8 mm allen wrench into steering relief port 5
(Figure 36) on the manifold block.
2. On the manifold block, insert a 5,000 psi pressure gauge
into quick disconnect test port 1 .
3. Start the engine and run at full throttle.
4. To start the vibration, press the pushbutton switch
(vibration control) located on top of the travel lever. The
relief pressure should read 900 ~ 1,500 psi.
5. If the vibration relief pressure is not 900 ~ 1,500 psi using
the allen wrench adjust the pressure at port 5 until the
pressure guage reads correctly.