Safety, assembly, operating, and maintenance instructions (76 pages)
Summary of Contents for Walker Hi-Dump
Page 1
Hi-Dump Operation April 5, 2005 Lift Switch Operation 1. Pump runs. 2. The valve solenoids do not activate. Oil goes thru the valves to the cylinder. The relays are not energized. Current goes thru in their normal position. Dump Switch Operation Both relays are energized.
Page 2
Hi-Dump Operation Series Wound Motor S/N 2008-1508 & ON Lift Switch Operation 1. SPDT switch controls direction of pump motor rotation. 2. Valve block spools do not shift and oil is directed to the lift cylinder. 3. Pump rotation dictates the cylinder direction.
Page 3
HI-DUMP ATTACHMENT ADJUSTMENTS ® 1. Adjust the lift section of the Hi-Dump by adjusting the two long control rods with ball joints on the ends. These ball joints have LH and RH threads. To adjust, loosen the jam nuts on each one and turn the rods. They must be adjusted equally.
Page 4
Hydraulic Pressure Test Manifold Part # Discription 25.901-5000#-1/4LM NOSHOK Pressure Gauge PN400S PARKER Needle Valve 1/4 MMS-S PARKER Branch Tee, NPT 4-4 FLO-S PARKER Male O-Ring Face Seal to Male NPT Straight Adapter Optional, Customer Can use existing plumbing if available: 60-JC-JC-4-4-4-16.00"...
Page 5
WALKER HD8400 ELECTRICAL SCHEMATIC GRN/ BLU/ RELAY - A RELAY - B Hydraulic GRN/ Hydraulic Hydraulic Pump Valve Valve Block Block BLU/ Coil Coil LIFT DUMP SWITCH SWITCH DOWN DOWN JUNCTION JUNCTION 40 AMP CIRCUIT BREAKER...
Page 6
WALKER HD8400 Beginning S/N 2008-1708 ELECTRICAL SCHEMATIC Hydraulic Hydraulic Valve Valve Block Block Coil Coil RED/YEL Hydraulic Pump DUMP LIFT SWITCH SWITCH RED/ RED/ RED/ DOWN DOWN JUNCTION JUNCTION 40 AMP CIRCUIT BREAKER To Red Wire on Time-Delay Harness...
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