Skyjack SJ519 TH, Service Manual

Page: 103 / 108

103
SJ519 TH 216942AC
Non-Routine Maintenance Section 4 – Procedures
Fork Tilt Pressure
▪
Fork Tilt Pressure Check:
1. Install a 5,000 psi gauge at port GP3 of Main
Manifold.
GP3 Test
Port
Ma
chin
e
Fro
nt
2. With engine running at low idle, dead-head in
both directions the fork tilt function. Indicated
system pressure should be 3,500 psi for both
directions.
3. If reading is different than 3,500 psi, adjustment
is required.
▪
Fork Tilt Pressure Adjustment:
▪
Fork Tilt Cylinder Extend
1. Loosen the lock nut on the pressure reducing
valve at port RV5 on the Main Manifold.
2. With engine running at low idle, turn the
adjustment screw clockwise (CW) to increase
the pressure reading and counter-clockwise
(CCW) to reduce the pressure reading until
desired reading is achieved.
3. Tighten the lock nut on the valve RV5 and re-
check the reading to ensure that the correct
pressure is maintained.
▪
Fork Tilt Cylinder Retract
1. Loosen the lock nut on the pressure reducing
valve at port RV4 on the Main Manifold.
2. With engine running at low idle, turn the
adjustment screw clockwise (CW) to increase
the pressure reading and counter-clockwise
(CCW) to reduce the pressure reading until
desired reading is achieved.
3. Tighten the lock nut on the valve RV4 and re-
check the reading to ensure that the correct
pressure is maintained.
Port RV4
Port RV5
Ma
chin
e
Fro
nt