Valve Adjustments - Tilt Limiter Manifold - Genie GTH-636 Service Manual

June 2007
REV C
7-23
Valve Adjustments -
Tilt Limiter Manifold
How to Set the Tilt Limiter
Pressure
Note: Be sure that the hydraulic oil level is visible
in the inspection glass of the hydraulic tank.
Note: Two technicians are required to perform this
procedure.
1 GTH-636, GTH-644, GTH-842 and GTH-844:
Install a 0 to 3500 psi / 0 to 250 bar pressure
gauge into test port 4 at the side of the
hydraulic tank.
Note: There are four test ports at the hydraulic
tank. Test port 1 is closest to the tank; test port 4 is
farthest from the tank.
2 GTH-1048 and GTH-1056: Install a
0 to 3500 psi / 0 to 250 bar pressure gauge into
test port 6 at the side of the hydraulic tank.
Note: There are six test ports at the hydraulic tank.
Test port 1 is closest to the tank; test port 6 is
farthest from the tank.
GTH-1048
GTH-1056
a test port
b test port 4
c test port 3
d test port 1
a b c d
Part No. 97487 GTH-636 • GTH-644 • GTH-842 • GTH-844 • GTH-1048 • GTH-1056
GTH-636
GTH-644
GTH-842
GTH-844
6
b c d
Section 4 • Repair Procedures
3 Start the engine. Allow the engine to idle after
warming the engine to operating temperature.
4 Activate the fork level up function until the fork
level cylinder is fully retracted, then continue to
activate the function while observing the
pressure on the gauge.
Result: The pressure gauge reads
1250 psi / 86.2 bar. The pressure setting is
correct.
Result: The pressure gauge fails to read
1250 psi / 86.2 bar. The pressure setting needs
to be adjusted. Continue to step 5.
5 Locate the tilt limiter relief valve (schematic item
BA) of the tilt limiter manifold on the front of the
hydraulic tank. Loosen the jam nut at the top of
the valve. Turn the adjustment screw clockwise
to increase the pressure or counterclockwise to
decrease the pressure. Tighten the jam nut and
repeat this procedure beginning with step 4.
Note: It may be necessary to perform this
adjustment 5 or 6 times to ensure a correct
pressure setting.
a
b
BA
c
a hydraulic tank
b tilt limiter manifold
c tilt limiter relief valve
MANIFOLDS
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