McElroy MegaMc, Руководство оператора

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Troubleshooting
Problem Action
Load Lowers
a) May need to replace lift cylinder seals.
b) May need to replace counterbalance valve.
• If counterbalance valve requires replacement:
1. Lower pipe stand completely.
2. Remove pipe from pipe stand.
3. Turn valve adjustment fully clockwise.
4. Slowly and carefully remove valve cartridge from valve body.
c) May need to increase the counterbalance valve setting. Proper coun-
terbalance valve setting is 1-1/4 turns clockwise from fully counter
clockwise position.
Engine Will Not
Start
See the engine operator's manual for engine troubleshooting
Load Will Not Raise
a) Check fl uid level in hydraulic reservoir.
b) May need to replace counterbalance valve.
c) May need to increase relief valve setting on HPU.
To adjust relief valve:
Turn relief valve adjustment clockwise to increase setting. Proper setting,
2500 psi can only be achieved when actuating either control valve lever,
and the corresponding cylinder is bottomed-out.
TX03055-3-2-10
5 - 4
Maintenance