2) Directional Control Valve
Relief pressure setting should be 2000 +/-50 PSI. To adjust pressure:
1. Remove hex cap (item 1) covering pressure relief valve.
2. With a 5/16” allen wrench, turn pressure adjustment screw (item 2) three turns counter
clockwise.
3. Remove hex cap (item 3).
4. Attach pressure gauge to fitting (item 4). Note: male thread on fitting is 7/8-14, 37
degree JIC.
5. Block all wheels and engage parking brake. (parking brake must be adjusted properly
in order to perform this test. See page 19 for adjustment procedures).
6. Start engine, increase throttle to full speed (on 13HP engines move throttle fully to the
left; on 20HP engines turn throttle lever clockwise), and shift directional control valve to
the Forward direction.
7. Squeeze speed control lever (item 5) until maximum pressure is registered on the gauge
without stalling engine.
8. Adjust relief pressure to 2000 PSI. Turn pressure adjusting screw (item 2) clockwise to
increase pressure or counterclockwise to decrease pressure.
9. Remove pressure gauge and replace hex caps (items 1 and 3).
10. Lubricate directional control valve spool and linkage.
REAR VIEW
2
PRESSURE ADJUSTMENT SCREW
1
3
4
5
3.4 - Pressure Settings, continued
SECTION 3
SERVICE
055838 Page 55
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