JLG 500RTS ANSI Service Manual - Manual (Page 25)

SECTION 2 - PROCEDURES
3120696 – JLG Sizzor – 2-9
7. Bottom out Rear Steer Right and Steer Left functions
and adjust each Steer Crossover Relief to 1500 psi
(103 bar).
8. Bottom out Platform Ext. Extended functions and
adjust each Ext. Crossover Relief to 500 psi (34 bar).
9. De-energize Platform Ext. function, shut down
motor, and disconnect pressure gauge.
2.15 DRIVE PUMP START-UP PROCEDURE
NOTICE
THE FOLLOWING PROCEDURE SHOULD ALWAYS BE PER-
FORMED WHEN STARTING A NEW PUMP OR WHEN RESTARTING
AN INSTALLATION IN WHICH EITHER THE PUMP OR MOTOR
HAVE BEEN REMOVED FROM THE SYSTEM.
THE FOLLOWING PROCEDURE MAY REQUIRE THE MACHINE TO
BE DISABLED (WHEELS RAISED OFF THE GROUND, DRIVE
FUNCTION DISCONNECTED, ETC.) WHILE PERFORMING THE
PROCEDURE IN ORDER TO PREVENT INJURY TO TECHNICIAN
AND OTHER PERSONNEL. TAKE NECESSARY SAFETY PRECAU-
TIONS BEFORE MOVING THE MACHINE.
1. Prior to installing pump and/or motor, inspect unit(s)
for damage incurred during shipping and handling.
Make certain all system components (reservoir,
hoses, valves, fittings, heat exchanger, etc.) are
clean prior to filling with hydraulic fluid.
2. Fill reservoir with recommended hydraulic fluid,
which should be passed through a 10 micron (nomi-
nal, no bypass) filter prior to entering the reservoir.
The use of contaminated fluid will cause damage to
components, which may result in unexpected
machine movement.
3. The inlet line leading from the reservoir to the pump
should be filled prior to start-up. Check inlet line for
properly tightened fittings and make sure it is free of
restrictions and air leaks.
4. Be certain to fill pump and/or motor housing with
clean hydraulic fluid prior to start-up. Fill housing by
pouring filtered oil into upper case drain port.
5. Install a 0 to 50 psi (0 to 35 bar) pressure gauge in
the charge pressure gauge port to monitor charge
pressure during start-up.
6. It is recommended that the external control input
signal electrical connections be disconnected at the
pump control until after initial start-up. This will allow
the pump to remain in its neutral position.
7. Jog or slowly rotate prime mover until charge pres-
sure starts to rise. Start prime mover and run at the
lowest possible RPM until charge pressure has been
established. Excess air may be bled from high pres-
sure lines through high pressure gauge ports
DO NOT START PRIME MOVER UNLESS PUMP IS IN NEUTRAL
POSITION (0 DEGREES SWASHPLATE ANGLE). TAKE PRECAU-
TIONS TO PREVENT MACHINE MOVEMENT IN CASE PUMP IS
ACTUATED DURING INITIAL START-UP.
8. Once charge pressure has been established,
increase speed to normal operating RPM. Charge
pressure should be approximately 22 psi (15.5 bar)
minimum. If charge pressure is incorrect, shut down
and determine cause for improper pressure.
INADEQUATE CHARGE PRESSURE WILL AFFECT THE OPERA-
TORS ABILITY TO CONTROL THE MACHINE.
9. Shut down prime mover and connect external con-
trol input signal. start prime mover, checking to be
certain pump remains in neutral. with prime mover at
normal operating speed, slowly check for forward
and reverse machine operation.
10. Charge pressure should remain at 22 psi to 24 psi
(15.5 bar to 16.9 bar) minimum during forward or
reverse operation. Continue to cycle slowly between
forward and reverse for at least five minutes.
11. Shut down prime mover, remove gauges, and plug
ports. Check reservoir level and add fluid if neces-
sary.