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HYDRAULIC PUMP REGULATOR TEST AND ADJUSTMENT--ENGINE PULLDOWN - Continued
HYDRAULIC PUMP REGULATOR TEST AND ADJUSTMENT--ENGINE PULLDOWN - Continued

Maintenance Manual For Hydraulic Excavator Model 230Lcr
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TM 5-3805-280-24-1
Tests
j. Adjust the system relief valve (D) to operating
pressure:
· Run the engine at fast idle.
· Actuate and hold both propel functions over relief.
· Loosen 32 mm nut (H). Turn second adjusting
plug (G) in to obtain specified pressure. Tighten
nut.
System Relief Valve--Specification
Pressure ............................................................. 34 325 + 1960 - 980 kPa
(343 + 19.6 - 9.8 bar)
(4980 + 285 - 0 psi)
D--System Relief Valve
E--First Adjusting Plug
F--27 mm Nut
G--Second Adjusting Plug
H--32 mm Nut
I--Piston
9025
25
114
Continued on next page
TX,9025,GG2661
­19­06MAY97­12/14
6-245


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