Komatsu PC58UU-3 User Manual

PC58UU-3
20-123
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TESTING AND ADJUSTING
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Adjusting
★
Travel deviation can be corrected by draining a
part of the amount of oil discharged from the
pump which discharges more oil with the
adjustment plugs.
If the travel deviation is corrected by this
method, however, the travel speed, work equip-
ment speed in the compound operation, and
relief pressure lower since the pump discharge
is reduced.
★
The following is the method of correcting devia-
tion when the machine deviates to the right
(left) in both travel directions.
★
Travel deviation can be corrected by the follow-
ing method only when it is 200 mm or less.
1. Check the position of each adjustment plug of
the main pump.
• When the machine deviates to the right:
Loosen the adjustment plug (1).
• When the machine deviates to the left:
Loosen adjustment plug (2).
★
Loosen only either plug. Do not loosen both
plugs at the same time.
2. Insert hexagonal wrench (Width across flats: 4
mm) in adjustment plug (1) or (2).
★
Insert hexagonal wrench securely.
3. Loosen locknut (3) with the hexagonal wrench
inserted.
★
Before adjusting, mark the position of the
locknut with paint.
★
Loosen the locknut with the hexagonal
wrench in position.
• Loosening angle of locknut:
Approx. 90 ~ 180°
4. Correct the travel deviation by loosening
adjustment plug (1) or (2).
• Quantity of correction of travel deviation
per turn of adjustment plug:
150 mm (For reference)
★
When the machine is shipped, the adjust-
ment plugs are tightened fully. Adjust the
correction angle by the loosening angle of
the adjustment plugs.
★
If the adjustment plug is dragged when the
locknut is loosened, tighten it again.
★
The adjustable range of each adjustment
plug is 2 turns (720°) from the tightened
position.
5. Tighten locknut (3).
6. Check for travel deviation again. If the machine
still deviates, adjust again according to the
above procedure.
★
Do not loosen the adjustment plugs more
than the adjustable range [2 turns (720°)].
If the adjustment plug is loosened
more than the adjustment limit,
high-pressure oil spouts out. Use
extreme caution.
Lower the work equipment to the
ground and stop the engine. Then,
loosen the hydraulic oil filler cap
slowly to release the internal pres-
sure of the hydraulic tank.
Locknut:
2.94 ~ 4.9 Nm {0.3 ~ 0.5 kgm}

Komatsu PC58UU-3 Specifications

General

Brand	Komatsu
Model	PC58UU-3
Category	Construction Equipment
Language	English