Skyjack SJKB-40-D, Operating Maintenance Instructions & Part List

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SECTION 5, Page 26 SJKB-40-D, SJKB-40-D/F
JUN. 1999
LOW DRIVE PRESSURE ADJUSTMENT
1) Fully lower and retract boom.
2) Tee a 1000 PSI gauge into the port marked Ps on the drive pump. Refer to Figure 5-17.
3) Start engine, and check gauge reading with boom fully lowered and retracted. It should read 390 PSI.
4) Extend telescope 3 feet. Adjust Hi/Low relief valve to 250 PSI. Refer to Figure 5-18.
5) Remove gauge and test drive. With boom fully lowered and retracted high drive will be available. With the
boom above horizontal or extended, only low drive will be available.
TEE A 1000 PSI
GAUGE INTO HOSE
AT Ps PORT
Ps
PORT
PILOT PRESSURE HOSE
TO TURRET MANIFOLD
Figure 5-17. Drive Pump.
Ma40-516
Figure 5-18. Hi/Low Relief Valve Location.
HI/LOW RELIEF
VALVE
Ma40-510