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Page Title:
ADJUSTMENT OF BOOM EXTEND RELIEF VALVE - CONTINUED |
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 TM 10-3930-660-24-1
MAIN CONTROL VALVE MAINTENANCE - CONTINUED
0175 00
ADJUSTMENT OF BOOM EXTEND RELIEF VALVE - CONTINUED
8.
Release hydraulic lever (TM 10-3930-660-10).
9.
Remove acorn nut (16) covering slotted head adjusting screw (17).
10.
While holding adjusting screw (17), loosen and back off jamnut (18) which secures adjusting screw.
11.
Operate boom extend function until boom is fully extended. Continue to hold boom control lever in extend position so
hydraulic oil passes over relief valve (TM 10-3930-660-10).
12.
To increase relief pressure, turn adjusting screw clock-
wise (in). To decrease pressure, turn adjusting screw
counterclockwise (out).
13.
Adjust boom extend relief valve pressure between
2,950 to 3,050 psi (20340 to 21029 kPa).
14.
When desired relief pressure is obtained, release boom
extend lever.
12
15.
Hold adjusting screw (17) in position and tighten jam-
11
nut (18).
15
16.
Install acorn nut (16).
17.
Perform steps 4 through 13 of adjustment of main
relief valve.
13,14
409-4068
0175 00-6
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