TM-9-2320-366-34-3 MTV Direct Maintenance Manual M1083 Series - Volume 3 Download
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TM 9-2320-366-34-3 17-20 Change 2 17-3. M1090/M1094 FOUR-WAY RELIEF VALVE REPLACEMENT/REPAIR (CONT) (10) Press and hold DUMP BED UP/DOWN switch (8) in UP position until hydraulic oil temperature reaches 140-160º F (60-70º C). (11) Perform STE/ICE-R test #51 (TM 9-4910-571- 12&P). (12) Observe pressure reading of 2825-2875 psi (19478- 19822 kPa). (13) If pressure is incorrect, loosen lock nut (9) on pressure reducing valve adjusting screw (10). (14) Turn pressure reducing valve adjusting screw (10) counter clockwise to lower pressure, clockwise to raise pressure. CAUTION WARNING Hydraulic oil temperature must be 140- 160 F (60-70 C) prior to performing adjustment. Failure to comply may result in inaccurate test results. NOTE • Holding DUMP BED UP/DOWN switch in the UP position will force hydraulic oil through relief valve and cause oil temperature to rise. • Measure hydraulic oil temperature near bottom of hydraulic reservoir. • Steps (10) through (14) require the aid of an assistant. Hydraulic components are hot when hydraulic oil reaches operating temperature. Use caution when handling hydraulic components. Wear gloves or use rags to hold metal objects. Failure to comply may result in injury to personnel. NOTE Hold pressure-reducing valve adjusting screw while tightening lock nut.