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Hyundai 35D-7E User Manual

Hyundai 35D-7E
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9-10
6. HYDRAULIC SYSTEM
Trouble symptom
1. Large fork lowering speed.
2. Large spontaneous tilt of
mast.
Â
Seal inside control valve defective.
Â
Oil leaks from joint or hose.
Â
Seal inside cylinder defective.
Â
Tilting backward : Check valve defec-
tive.
Â
Tilting forward : tilt lock valve defect-
ive.
Â
Oil leaks from joint or hose.
Â
Seal inside cylinder defective.
Â
Clean or replace.
Â
Clean or replace.
Â
Replace.
Â
Replace seal.
Â
Replace spool or valve body.
Â
Replace.
Â
Replace packing.
PProbable cause Remedy
3. Slow fork lifting or slow
mast tilting.
4. Hydraulic system makes
abnormal sounds.
5. Control valve lever is locked
6. High oil temperature.
Â
Lack of hydraulic oil.
Â
Hydraulic oil mixed with air.
Â
Oil leaks from joint or hose.
Â
Excessive restriction of oil flow on
pump suction side.
Â
Relief valve fails to keep specified
pressure.
Â
Poor sealing inside cylinder.
Â
High hydraulic oil viscosity.
Â
Mast fails to move smoothly.
Â
Oil leaks from lift control valve spool.
Â
Oil leaks from tilt control valve spool.
Â
Excessive restriction of oil flow pump
suction side.
Â
Gear or bearing in hydraulic pump
defective.
Â
Foreign matter jammed between sp-
ool and valve body.
Â
Valve body defective.
Â
Lack of hydraulic oil.
Â
High oil viscosity.
Â
Oil filter clogged.
Â
Add oil.
Â
Bleed air.
Â
Replace.
Â
Clean filter.
Â
Adjust relief valve.
Â
Replace packing.
Â
Change to SAE10W, class CF engine
oil.
Â
Adjust roll to rail clearance.
Â
Replace spool or valve body.
Â
Replace spool or valve body.
Â
Clean filter.
Â
Replace gear or bearing.
Â
Clean.
Â
Tighten body mounting bolts uniform-
ly.
Â
Add oil.
Â
Change to SAE10W, class CF engine
oil.
Â
Clean filter.

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Hyundai 35D-7E Specifications

General IconGeneral
BrandHyundai
Model35D-7E
CategoryForklifts
LanguageEnglish

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