4.2 HP RELIEF VALVE PRESSURE CHECK 3UHVVXUH UHOLHI SRUW )RUZDUG
3UHVVXUH UHOLHI SRUW 5HYHUVH
5. Start the engine and warm up the engine until the hydraulic fluid gets warm properly. (Transmission fluid temperature: 50 ~ 60°C (122 - 140°F)). 6. Place the range shift lever in the high speed position. Then, while the brake pedal is firmly depressed, depress the HST pedal gradually to rev up the engine.
ENGINE
GENERAL
CAUTION
CLUTCH
•
TRANSMI SSION TRANSMISSION
WARNING R69W626B
•
REAR BRAKE AXLE
REAR HSTAXLE
TRANSMI SSION HST
•
R69W627A
7. When the opening sound of the relief valve is heard, read the pressure. Standard (forward/reverse driving).................. 29.4 MPa 30 kgf/cm2
FRONT BRAKE AXLE
4,266 psi
STEERING SYSTEM FRONT AXLE HYDRAULIC STEERING SYSTEM
If the tractor moves with the brake pedal depressed, it can cause an accident. Stop the test immediately and resume the test after the service. Never let anyone other than the driver get near the front and rear side of the tractor. Any observer can be hit by a tractor during the test and he/she can seriously get injured.
R69W628A
1. Remove the footstep (1) of the under the seat. 2. Disconnect the pressure gauge plug (2) of the HST through the clutch housing hole. 3. Install the adapter (PF 3/8) for pressure gauge installation to the pressure relief plug. 4. Connect the pressure gauge (400 kgf/cm2 or higher).
8. Set the gauge to the other port and repeat the above procedures. 9. If both relief pressure in forward/reverse driving is below the specified value, it is considered that the parts in the HST are worn. If only one relief pressure of forward or reverse driving is below the specified value, it is considered that the high pressure relief valve in low pressure section is stuck or the neutral valve is defective. However, the charge pressure, the amount of oil and the oil condition (dirty or aged) should be inspected beforehand.
IMPORTANT •
Do not open the relief valve for over 10 seconds to avoid the chance of oil overheating.
A/C AND INDEX HEATER
HYDRAULIC ELECTRIC & DIAGNOSIS SYSTEM
Make sure the lock of the brake (one side) is not unlocked.
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DR72-W00
Dealer Copy -- Not for Resale
SAFETY FIRST
HST - MEASUREMENT AND ADJUSTMENT
