JLG 530LRT, Руководство по обслуживанию и ремонту

Страница: 114 / 262

SECTION 4 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
4-4 3121781
4.6 DRIVE PUMP START-UP PROCEDURE
THE FOLLOWING PROCEDURE SHOULD ALWAYS BE PERFORMED 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 SHOULD ALWAYS BE PERFORMED 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 DIS-
ABLED (WHEELS RAISED OFF THE GROUND, DRIVE FUNCTION DISCON-
NECTED, ETC.) WHILE PERFORMING THE PROCEDURE IN ORDER TO
PREVENT INJURY TO TECHNICIAN AND OTHER PERSONNEL. TAKE NEC-
ESSARY SAFETY PRECAUTIONS BEFORE MOVING THE MACHINE.
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.
Fill reservoir with recommended hydraulic fluid, which
should be passed through a 10 micron (nominal, 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.
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.
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.
Install a 0 to 500 psi (0 to 35 bar) pressure gauge in the
charge pressure gauge port to monitor charge pressure
during start-up.
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.
“Jog” or slowly rotate prime mover until charge pressure
starts to rise. Start prime mover and run at the lowest
possible RPM until charge pressure has been estab-
lished. Excess air may be bled from high pressure lines
through high pressure gauge ports.
DO NOT START PRIME MOVER UNLESS PUMP IS IN NEUTRAL POSITION
(0 DEGREES SWASHPLATE ANGLE). TAKE PRECAUTIONS TO PREVENT
MACHINE MOVEMENT IN CASE PUMP IS ACTUATED DURING INITIAL
START-UP.
Once charge pressure has been established, increase
speed to normal operating RPM. Charge pressure
should be approximately 220 psi (15.5 bar) minimum. If
charge pressure is incorrect, shut down and determine
cause for improper pressure.
INADEQUATE CHARGE PRESSURE WILL AFFECT THE OPERATOR’S ABIL-
ITY TO CONTROL THE MACHINE.
Shut down prime mover and connect external control
input signal. Start prime mover, checking to ensure
pump remains in neutral. With prime mover at normal
operating speed, slowly check for forward and reverse
machine operation.
Charge pressure should remain at 220 psi to 240 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.
Shut down prime mover, remove gauges, and plug
ports. Check reservoir level and add fluid if necessary.