TRANSMISSION
B2301, B2601, WSM
2-S8
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING
(1) HST
Charge Relief Pressure
• When checking, park the tractor on flat ground and fully
engage the parking brake.
1. Remove the cover (1).
2. Remove the plug from P1 port (reverse) (2) or P2 port (forward)
(3).
• If the plug is tight to remove, warm up the plug by a hair
drier etc..
3. Install the adaptor (4) to P1 port (2) or P2 port (3).
4. Install the cable (7) and low pressure gauge to the adaptor (4).
5. Start the engine and warm the oil before testing.
6. Change the range gear shift lever (5) to "NEUTRAL" position.
7. Operate the engine at the rated speed.
8. Release the foot from the HST pedal (6).
9. Read the low pressure gauge to measure the charge relief
pressure.
10. If the measurement is not same as factory specification, check
the charge relief valve and the related hydraulic components.
• Low pressure gauge is 2.9 MPa (30 kgf/cm
2
, 427 psi) full
scale.
(When reassembling)
• Apply liquid lock (Three Bond 1324B or its equivalent) to the
plug.
9Y1211156TRS0004US0
Engine speed Rated speed
Range gear shift position Neutral
HST pedal Neutral
Charge pressure Factory specification
0.4 to 0.6 MPa
4 to 6 kgf/cm
2
60 to 80 psi
Tightening torque Checking port plug
29 to 44 N·m
3.0 to 4.5 kgf·m
21.7 to 32.5 lbf·ft
(1) Cover
(2) P1 port (reverse)
(3) P2 port (forward)
(4) Adaptor
(5) Range Gear Shift Lever
(6) HST Pedal
(7) Cable
L: Low speed position
M: Medium speed position
N: Neutral position
H: High speed position
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