Checking, Disassembling And Servicing; Checking And Adjusting; Hst - Kubota B2301 Workshop Manual

B2301, B2601, WSM

4. CHECKING, DISASSEMBLING AND SERVICING

[1] CHECKING AND ADJUSTING

(1) HST

Charge Relief Pressure
CAUTION
• 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).
NOTE
• 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).
Engine speed
Range gear shift position
HST pedal
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.
Charge pressure Factory specification
NOTE
• Low pressure gauge is 2.9 MPa (30 kgf/cm
scale.
(When reassembling)
• Apply liquid lock (Three Bond 1324B or its equivalent) to the
plug.
Tightening torque Checking port plug
(1) Cover
(2) P1 port (reverse)
(3) P2 port (forward)
(4) Adaptor
(5) Range Gear Shift Lever
(6) HST Pedal
(7) Cable
2-S8
TRANSMISSION
Rated speed
Neutral
Neutral
0.4 to 0.6 MPa
2
4 to 6 kgf/cm
60 to 80 psi
2
, 427 psi) full
29 to 44 N·m
3.0 to 4.5 kgf·m
21.7 to 32.5 lbf·ft
L: Low speed position
M: Medium speed position
N: Neutral position
H: High speed position
9Y1211156TRS0004US0
KiSC issued 11, 2014 A