Methods For Inspecting Performance; Adjusting Method; Hydraulic Oil Pressure; Main Relief Valve Set Pressure - Takeuchi TB 250 Workshop Manual

Methods for inspecting performance

Hydraulic oil pressure (Main relief valve set pres-
sure)
Boom, Arm, Dozer Blade
Measuring Method
• Engine: Maximum R. P. M.
• Hydraulic oil temp.: 50~60°C
• Mount the pressure gauge on the pressure detection
port, operate the desired hydraulic circuit and measure
the relief pressure.
Circuit Relief valve
Boom R1
Arm R2
Blade R3

Adjusting method

1. Loosen the locknut (2), and turn the setscrew (1) to
adjust the set pressure.
• To increase the set pressure, turn the setscrew
clockwise.
• To decrease the set pressure, turn the setscrew
counterclockwise.
2. Upon completion of the adjustment, tighten the lock
nut (2) by holding the setscrew (1) to prevent it from
turning.
3. Operate the relief valve again to confirm that the newly
set pressure is stabilized.
Pressure detection port
Port location Size
P1
P2 G1/4
P3
PERFORMANCE CRITERIA
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2-14
2
SERVICE DATA
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