Hydraulic Control Adjustment; Position Control Adjustment; Hydraulic Pump Relief Valve; Ac Generator - Mitsubishi MT160 Instruction Book

HYDRAULIC CONTROL ADJUSTMENT
The hydraulic control link has been carefully adjusted in
the factory, so that adjustment is hardly ever necessary.
However, if it is not working correctly, adjust it in the
following manner:
When carrying out this adjustment, stop and start the
engi ne as requ ired.
POSITION CONTROL ADJUSTMENT
Joint
Feedback I ink
a a: In case play is too small
;) or not available.
b
~
b: In case play is too great.
5
~
15mm (0.2
~
0.6 in.)
Ram shaft
Nut~
Lift arm
Joint
Arm
Start the engine, and operate the hydraulic control lever to
raise the lift arm to the maximum lifting position without
implement. With the arm so raised, stop ,the engine, and
check to be sure that there is a play of 5 to 15 mm (0.2
~
0.6 in.) at the top of the lift arm by hand.
CD
Move stop lever on lifting end all the way and fix it
there.
fI
Have a lift rod for implement removed off the lift arm.
ED
With engine running at about 1,000 rpm, raise the
control lever until it contacts the stopper and check
the amount of play at lift arm end to be about 5
~
15 mm (0.2
~
0.6 in) with the lift arm lifted.
NOTE
Without this play, hydraulic circuit will be subjected to
unnecessary pressure when implement is lifted, causing
trouble.
• If play is too small or not available, loosen feed back
link nut and turn the feed back link to the direction
of lift arm for adjustment (tightening direction).
• If play is too great, adjust it in direction away from lift
arm (loosening direction).
• Be sure to lock the feed back link nut after adjustment
without fail.
• After adjustment, attach implement and raise engine
speed slightly (over 1,500 rpm). Operate hydraulic
control lever to lift and lower the implement several
times to check the function.
A
CAUTION
Be sure to check that there is no relief sound (beeps)
generated after adjustment.
HYDRAULIC PUMP RELIEF VALVE
The hydraulic system is equipped with a pump relief valve
to protect the hydraulic pump and pipe line against
accidents caused by high hydraulic pressure in the system.
The set pressure is 135 kg/cm
2
(1,920 psi) at full flow.
Never disturb nor disassemble the pump relief valve since
its adjustment requires special tools and instruments.
AC GENERATOR
Generator
The generator is of an alternator type. Seal bearings are
employed for this generator, so that lubrication is not
necessary.
During maintenance, pay attention to the following points.
1. The generator is negative-grounded and if the polarity
is reversed, the diode will be damaged. Be careful
enough when connecting it to the battery.
2. As the battery voltage is always connected to the
terminal A, never run the engine with the terminal A
disconnected.
3. Don't water the alternator at high pressure.
4. Pay full attention to the belt tension so that normal
charging may be made.
5. During operation, be sure to set the starter switch at
"ON".
6. If difficulties are experienced, consult Mitsubishi
dealer.
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