Y-1
Y-1
Hydraulic Pressure Setting Table 7.2 Checking operation
[NOTICE]
[NOTICE]
Perform no operations during steps 2 ~ 4 below.
Before checking operation, check the pressure adjustment of the unload relief valve. Conditions Engine speed PTO A/C Oil cooler Oil temp.
2. The pressure drops until the accumulator pressure reaches the pressure at which pressure
-1
: 770 (min ) : ON : OFF : OFF : 50°C (122°F)
accumulation starts (on-load pressure). 3. Pressure accumulation starts, and the pressure rises until it reaches the pressure at which pressure accumulation stops (unload pressure).
◆In step 1, winch operation may also be used to decrease the accumulator pressure. However, when the pressure nears the on-load pressure, perform no operation and allow leakage to lower the pressure until pressure resupply (accumulation) starts.
4. The accumulated pressure is unloaded, and leakage causes the pressure to decrease. 5. Check that steps 2 ~ 4 are performed within 5 seconds or less.
◆The on-load pressure varies because of differences in engine speeds during pressure adjustment. The check here is only to verify that the on-load pressure is 9.8 MPa (1421psi) or above.
If they are not performed within 5 seconds or less, replace the valve assembly.
1. Do not operate, and wait for leakage to reduce the accumulator pressure.
8. Torque converter oil pressure Item
Torque converter oil pressure
MPa
psi
Engine speed -1 (min )
1.2 or over
170 or over
(IDL.) 770
2 - 2.3 or over
280 - 330
1700 (MAX.)
Set pressure
Check procedure
1. Turn the PTO switch ON. 2. Check the pressure with the torque converter oil pressure gauge on the combination meter.
8
WY03-0290E
