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Fisher Engineering EZ-V Mechanic's Manual
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Fisher Engineering EZ-V Mechanic's Manual

Snowplow
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Fisher Engineering
M
'
G
ECHANIC
S
UIDE
S
NOWPLOW
®

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Summary of Contents for Fisher Engineering EZ-V

  • Page 1 Fisher Engineering ECHANIC UIDE NOWPLOW ®...
  • Page 2 ® No. 21856 July 1997...
  • Page 3 • No. 21856 July 1997...

  • Page 4: Instruction Label

    Instruction Label Safety Label Instruction Label Safety Label WARNING U.S. Patent 4,280,062, 4,999,935 5,353,530, 5,420,480 and other patents pending LOWER BLADE WHEN VEHICLE IS PARKED. MOUNTING PLOW REMOVE BLADE ASSEMBLY BEFORE PLACING VEHICLE 1. Drive vehicle forward fully engaging 2. Twist connecting pin to release tension. 6.
  • Page 5 ® No. 21856 July 1997...
  • Page 6 Hydraulic 45° Street Elbow and Unit Straight Swivel 90° Street Elbow and Straight Swivel 45° Swivel 18" Hose Lift Cylinder 36" Hoses 36" Hose 34" Hose Passenger-Side Angle Cylinder (Right Side) Driver-Side Angle Cylinder (Left Side) PLOW SIDE No. 21856 July 1997...
  • Page 7 Motor Solenoid Valve Coil Solenoid Valve Cartridge Primary Valve Block Relief Valve Secondary Valve Block Pump Oil Return Line Pilot Operated Check Valve Pump Filter Reservoir No. 21856 July 1997...
  • Page 8 Solenoid Cartridge Valve—S1 Solenoid Cartridge Solenoid Cartridge Valve—S3 Valve—S6 Solenoid Cartridge Solenoid Cartridge Valve—S2 Valve—S4 Solenoid Cartridge Valve—S5 No. 21856 July 1997...
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  • Page 12 No. 21856 July 1997...
  • Page 13 Button Description of Operation Raise Press this button to raise the plow and to cancel the float mode. NOTE: Plow will automatically stop raising after 2.5 seconds. To resume raising the plow, release the button and press again. Lower Press this button to lower the plow. NOTE: After reaching the desired height, release the button. Holding the button down for more than 3/4 second will activate the float mode, indicated by green FLT lamp.

  • Page 14: Description Of Operation

    Button Description of Operation Raise Press this button to raise the plow and to cancel the float mode. NOTE: Plow will automatically stop raising after 2.5 seconds. To resume raising the plow, release the button and press again. Lower Press this button to lower the plow. NOTE: After reaching the desired height, release the button. Holding the button down for more than 3/4 second will activate the float mode, indicated by green FLT lamp.
  • Page 15 low side drive No. 21856 July 1997...
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  • Page 21 STRAIGHT BLADE (DEFAULT) R/VEE ANGLE RIGHT No. 21856 July 1997...
  • Page 22 No. 21856 July 1997...
  • Page 23 STRAIGHT BLADE (DEFAULT) L/SCP ANGLE LEFT No. 21856 July 1997...
  • Page 24 this button and every other activation thereafter extends the wing. This button toggles between retract and extend in wing mode. Upon entering wing mode, the first activation of this button and every other activation thereafter retracts the wing. The second activation of No.
  • Page 25 WING R/VEE * RIGHT RETRACT No. 21856 July 1997...
  • Page 26 Even though both sides of the cylinder piston will experience the same hydraulic pressure, the This button toggles between cylinder will extend due to retract and extend in wing mode. unequal force. The difference in Upon entering wing mode, the area between the base end and first activation of this button and rod end of the cylinder piston...
  • Page 27 WING R/VEE * RIGHT EXTEND No. 21856 July 1997...
  • Page 28 This button toggles between retract and extend in wing mode. Upon entering wing mode, the first activation of this button and every other activation thereafter retracts the wing. The second activation of this button and every other activation thereafter extends the wing.
  • Page 29 WING L/SCP * LEFT RETRACT No. 21856 July 1997...
  • Page 30 Even though both sides of the cylinder piston will experience the same hydraulic pressure, the This button toggles between retract cylinder will extend due to and extend in wing mode. Upon unequal force. The difference in entering wing mode, the first area between the base end and activation of this button and every rod end of the cylinder piston...
  • Page 31 WING L/SCP * No. 21856 July 1997...
  • Page 32 force on the base end which extends the cylinder. Force = Pressure X Surface Area. regenerative hydraulic circuit. Even though both sides of the cylinder piston will experience the same hydraulic pressure, the cylinder will extend due to unequal force. The difference in area between the base end and rod end of the cylinder piston creates a greater...
  • Page 33 V / SCOOP L/SCP SCOOP No. 21856 July 1997...
  • Page 34 No. 21856 July 1997...
  • Page 35 V / SCOOP R/VEE No. 21856 July 1997...
  • Page 36 No. 21856 July 1997...
  • Page 37 RAISE RAISE No. 21856 July 1997...
  • Page 38 No. 21856 July 1997...
  • Page 39 LOWER LOWER No. 21856 July 1997...
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  • Page 46 If the listed conditions are not met, the procedure can result in inaccurate results and wasted time. No. 21856 July 1997...

  • Page 47: Pin Connector

    14-Pin Connector Wire Color Pin No. Light Blue With Orange Stripe Blue With Orange Stripe Black With White Stripe Light Green Light Blue White With Yellow Stripe Brown With Red Stripe Orange With Black Stripe Brown With Green Stripe No. 21856 July 1997...
  • Page 48 CONDITION POSSIBLE CAUSE ACTION Motor does not run for any requested function. Poor connections in vehicle or snowplow battery Clean and re-establish connections. cables. Motor worn or damaged or pump seized. Go to Motor Test. Motor relay inoperative. Go to Motor Relay Test. Fault in vehicle wiring harness.
  • Page 49 CONDITION POSSIBLE CAUSE ACTION Wings will not lock hydraulically or hold position. Air in angle cylinders. Cycle wings stop to stop to remove air. Relief valves damaged or out of adjustment. Go to Relief Valve Inspection & Adjustment. P/O check valve stuck open Go to P/O Check Valve Inspection.
  • Page 50 CONDITION POSSIBLE CAUSE ACTION Vehicle daytime running lamps (DRLs) do not work – Parking brake on. Fully release parking brake. snowplow removed. Power in DRL circuit has been interrupted. Turn lamp and/or ignition switch on and off to cycle the DRL circuitry. No output from DRL module.
  • Page 51 Momentarily attach jumper cables Retest with jumper cable from Momentarily attach (+) Go to Motor from the battery to respective (+) battery (+) to (+) motor jumper cable between battery Relay Test. (-) motor terminals. Does motor terminal. Does motor run? and motor side of motor relay run? secondary.
  • Page 52 Motor Terminal Motor Terminal ( - ) Faston Connector ( + ) Small Red Wire (Male) Large Red Wire Small Red Wire (Female) Motor Relay Black\Orange Secondary Wire Terminals Small Red Wire Large Black Wire Large To Vehicle Large Black Harness Wire Wire...
  • Page 53 Motor does not run: Attach a ground jumper wire Attach a jumper cable across Go to Vehicle Harness Is there 12V at motor from battery (-) the motor relay secondary Test - Motor Relay. relay primary terminal terminals. to relay primary terminal with with brown/green wire? Does motor run? brown/red wire.
  • Page 54 14-Pin Connector Is there 12V at motor relay Remove jumper Install a jumper wire primary terminal with Is there 12V at pin #7? wire. Go to Control Is there 12V at pin #8? between pins #8 and brown/green wire? Test. #10.
  • Page 55 FUSES Remove and test F1 with ohmmeter. Remove and test F2 with ohmmeter. Replace control or proceed by carefully Is F1 good? Is F2 good? disconnecting the white coil cord connector from the PC board. Test the coil cord harness for continuity between the connectors according to the electrical schematic.
  • Page 56 Adjust pump relief Inspect pump relief Go to Relief Valve Is pump relief pressure Is the pressure 1750 ± 100 psi? zero? clockwise1/4 turn to valve for damaged Inspection and increase pressure. Did components or Adjustment. pressure change? contamination. Is pump relief valve OK? Is motor amp draw Go to Solenoid Coil...
  • Page 57 Solenoid Coil 12-PIN GRILL CONNECTOR PIN # 14-PIN CONNECTOR PIN # WIRE COLOR WHITE/ YELLOW LIGHT LIGHT BLACK/ BLUE/ LT BLUE/ BLUE GREEN WHITE ORANGE ORANGE ANGLE RIGHT ANGLE LEFT RIGHT RETRACT * RIGHT EXTEND * LEFT RETRACT * LEFT EXTEND * SCOOP RAISE LOWER...
  • Page 58 Do activated coils match the Is there 12v at all six red wires Disconnect 3-pin battery cable Go to Vehicle chart for all functions? attached to coils? harnesses at grill. Is there 12v at the Harness Test - small pin #3 of the vehicle battery Solenoid Coils.
  • Page 59 14-Pin Connector Disconnect the control in the Is there 12v at each of pins Is there 12v at any of For pins which do not have cab. Are any solenoid coils #1,2,3,4,5 & 6 of 14-pin pins #1,2,3,4,5 & 6? 12v, corresponding wire in activated? (Check for connector on vehicle harness?
  • Page 60 When testing the plow functions, be sure the control is not in “float.” ACTION REQUESTED PLOW REACTION POSSIBLE CAUSE • ⇒ S2 stuck shifted Angle Right Angle Left • ⇒ S3 stuck shifted None ⇒ Check valve B closed ⇒ Check valve A closed •...
  • Page 61 ACTION REQUESTED PLOW REACTION POSSIBLE CAUSE • ⇒ S2 stuck shifted Right Retract Left Retract • ⇒ S3 stuck shifted • ⇒ Check valve B closed None ⇒ Check valve D closed • ⇒ S6 stuck shifted Right Extend • ⇒...
  • Page 62 ACTION REQUESTED PLOW REACTION POSSIBLE CAUSE • ⇒ S2 stuck shifted Scoop Raise • ⇒ S3 not shifted Right Extend—left wing floats • ⇒ Check valve A closed Right Extend • ⇒ Check valve B closed Left Extend • ⇒ S4 not shifted Right Extend and Left Retract—wings not locked •...
  • Page 63 Relief Valve No. of Turns Backed Off Approximate (CCW) From Fully Seated Relief Valve Pressure (PSI) Pump Relief 2-1/2 - 2-3/4* 1750 Right or Left Cylinder 1-1/2 - 1-3/4** 3000 Primary Relief Right or Left Cylinder 1-1/4 - 1-1/2 3500 Secondary Relief Spring Spring Spacer...
  • Page 64 Check Valve Assembly O-ring P/O Check Valve Spool Back-up ring O-ring No. 21856 July 1997...
  • Page 65 APPLY 12V TO COIL CARTRIDGE VALVE MARKED ON HEX WATCH HERE PROBE HERE No. 21856 July 1997...
  • Page 66 At each relay, is there 12v at Apply 12v to relay terminal Unplug plug-in harness Red or orange wires terminal 30 with green (high 87a with red (high beam) or connectors at each vehicle open in plug-in beam) or yellow (low beam) orange (low beam) wires.
  • Page 67 Existing Passenger-Side Existing Vehicle Headlamp Connector Wire Harness Headlamp Relay Wiring Diagram Plug-In Harness Existing Driver-Side Headlamp Connector Plug-In Harness Male Plug Purple Plug-In Harness Headlamp Connectors Yellow Orange Green Purple Purple Vehicle Black/ Harness Orange Low Beam Passenger-Side High Beam Headlamp Relay Turn Signal Headlamp...
  • Page 68 Low Beam High Beam Ground Headlamp Headlamp 12-Pin Connector Left Turn Park Right Turn At each headlamp relay, is Apply (+) 12v to relay terminal 87 With (+) 12v applied at Black/orange ground there 12v at terminal 30 with with white (high beam) or black terminal 87, is there 12v at the wire in plow harness is green (high beam) or yellow...
  • Page 69 Low Beam High Beam Ground Headlamp Headlamp 12-Pin Connector Left Turn Park Right Turn Reconnect 12-pin grill Black/orange ground wire Do vehicle park lamps Disconnect 12-pin grill connector. connector. Remove p/t bulbs work? Is there 12v at terminal #11 on is open in plow harness.
  • Page 70 1/4 x 1-1/4" Pin 1/2" Flat Washer Gr. 8 Channel 1/2" Nut 1/2 x 1-1/2" Cap Screw Gr. 5 No. 21856 July 1997...
  • Page 72 Fisher Engineering P.O. Box 529 Rockland, ME 04841 ® ® Printed in USA July 1997 No. 21856...