Gradall 534D-6T Service Manual - Manual (Page 266)

T
ILT
C
IRCUIT
R
ELIEF
V
ALVES
7.0
• SET UP
1. Install a 10,000 PSI gauge, hose and adapter to the test port on
the outlet tube of the main implement pump. Make sure you can
see the gauge from the operator’s cab.
2. With the park brake engaged and the transmission in “Neutral”,
start the material handler.
• CHECK
1. With the engine running at low idle (800-900 RPM) and holding
the Attachment Tilt Lever fully forward, observe the gauge.
2. The gauge should read 2800 ± 100 PSI for all Models except the
544C-10 and 544D-10 which should read 3000 ± 100 PSI.
3. Raise the forks (or other attachment) until the cylinder bottoms.
4. Observe the gauge while holding the Attachment Tilt Lever fully
backward.
Again, the gauge should read 2800 ± 100 PSI for all Models except
the 544C-10 and 544D-10 which should read 3000 ± 100 PSI.
• ADJUST
1. Before attempting any adjustment, you must switch the engine
off! Also, make sure the park brake is still engaged.
2. If necessary, loosen the locknut and turn the adjusting screw
clockwise to increase pressure; counter-clockwise to reduce
pressure.
522, 524, 532C-6, 534C-6 and 534C-6T
MAIN IMPLEMENT TEST PORT
ALL OTHER MODELS
MAIN IMPLEMENT TEST PORT
TILT CIRCUIT RELIEF VALVE
NOTE!
The location of the main
implement test port varies by
machine vintage.