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Columbia AA4VG71 Instructions Manual

Hydrostatic pump, 40/50 hp for models, 50/60
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Article Type: Instructions
Hydrostatic Pump, 40/50 HP for
Description:
Instructions on "How to" properly adjust the Hydrostatic Pump 40/50 HP,
"AA4VG71".
Adjusting relief valves, fine and course adjustments,
checking oil temperature, and pump itemized breakdown.
Never work on, clean or service this unit, control panel or any machine or open
or remove any protective cover, guard, grate, door, or maintenance panel until
the power or energy sources has been turned off, locked out / tagged out, and all
moving parts have come to a complete stop and or blocked to prevent
movement. Machinery is dangerous – avoid personal injury and or death by
following manufacture, Local, and OHSA safety procedures. Contact Columbia
Machine for safety decals, guards, horns and beacons.
Models, 50/60
WARNING

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Summary of Contents for Columbia AA4VG71

  • Page 1 Machinery is dangerous – avoid personal injury and or death by following manufacture, Local, and OHSA safety procedures. Contact Columbia Machine for safety decals, guards, horns and beacons.

  • Page 2: Table Of Contents

    40/50HP PUMP AA4VG71 Columbia Machine, Inc. Vancouver, Washington HYDROSTATIC PUMP SYSTEM INFORMATION This manual provides information applicable to the Columbia Block Machine 16HF/1600 manufacturing systems equipped with the Hydrostatic drive. CONTENTS Adjusting Relief Valves ................2 Fine Adjustment ..................4 Course Adjustment ..................

  • Page 3: Adjusting Relief Valves

    Adjustment to the VT-200K or VTVSPA1 electrical card can be done after all manual adjustment have been completed. (Refer to electrical card adjustments) To adjust the model AA4VG71 pump, follow the steps below: All high pressure relief valve adjustments on sizes 71 and 90 NOTE to be done with a 11 mm box wrench and a 19 mm box wrench.
  • Page 4 5. Stroke the pump to approximately 20 percent of full flow in one direction and adjust the high pressure relief for that flow direction. Acceleration pressure at 3500 relief should begin to open. Deceleration set at 2500 psi. For the AA4VG71 and AA4VG90 one turn equals 2200 psi (150 bar).

  • Page 5: Fine Adjustment

    Columbia Concrete Products HYDROSTATIC PUMP FINE ADJUSTMENT The only time fine adjustment would be made is if electrical pin NOTE has been disconnected and vibrator is still slightly rolling over. Look at the acceleration and deceleration gauges. These will be the two outside gauges.

  • Page 6: Course Adjustment

    Columbia Concrete Products HYDROSTATIC PUMP COURSE ADJUSTMENT For course adjustment the following parts will be needed: 1. Two each ¼ inch 37 degree straight thread O-ring fittings. 2. One each ¼ inch hydraulic hose with two ¼ inch 37 degree straight female swivel fitting on both ends.

  • Page 7: Preparation For Adjustment

    Columbia Concrete Products HYDROSTATIC PUMP PREPARATION FOR ADJUSTMENT The control piston has strong centering springs to ensure that once the pump is adjusted for the neutral position it will always return to neutral. If an adjustment is necessary follow the steps listed below.

  • Page 8: Charge Pressure Setting

    Columbia Concrete Products HYDROSTATIC PUMP CHARGE PRESSURE SETTING Change Pressure Relief Valve Adjustment For AA4VG28…AA4VG56 With pressure gauge installed at G port run pump at normal operating speed and temperature. If pressure is low, remove relief valve and add shim(s). If pressure is high, remove relief valve and take shim(s) out.

  • Page 9: Removal & Installation Of Shaft Seal

    Columbia Concrete Products HYDROSTATIC PUMP REMOVAL & INSTALLATION OF SHAFT SEAL Remove the retaining ring with snap pliers Screw in sheet metal screw into the holes fitted with rubber. Pull out shaft seal with pliers. Press in shaft seal with bushing to the stop.

  • Page 10: Checking The Oil Temperature

    Change filter and reset filter indicator. Check oil for contamination. If oil smells burnt, replace with AW46 oil and change all filters. If problem continues call the Columbia Service Department for assistance. 1/04 Page 9...

  • Page 11: Pump Itemized Breakdown

    Columbia Concrete Products HYDROSTATIC PUMP 40/50 HP Hydrostatic Pump Unit 1. Deceleration pressure (MA) 2. Charge pump pressure (G) 3. Acceleration pressure (MB) 4. Return filter high pressure 5. Heat exchanger 6. Charge pump filter 7. Return from hydraulic motor 8.
  • Page 12 Columbia Concrete Products HYDROSTATIC PUMP 40/50 HP Hydrostatic Pump Unit 1. Pump case drain 2. Filter out to FA port 3. Filter in from FE port 4. X2 Port 5. X1 Port 6. POR Valve 7. Null fine adjustment 1. Fan motor 2.
  • Page 13 Columbia Concrete Products HYDROSTATIC PUMP 40/50 HP Hydrostatic Pump Unit 1. G port charge pump pressure 2. MB gauge port acceleration 3. MA gauge port deceleration 4. Null course adjustment 5. Detent pin override on EP controller valve 6. Acceleration relief cartridge 7.
  • Page 14 Columbia Concrete Products HYDROSTATIC PUMP 40/50 HP Hydrostatic Pump Unit (1) Fan Switch (2) Low Oil (3) Over Temperature Heat exchanger motor lock-out High pressure Main pump pump filter. electric motor lock-out Fan switch 125 degrees - Part # 2327616...
  • Page 15 Columbia Concrete Products HYDROSTATIC PUMP 40/50 HP Hydrostatic Pump Unit Return Filter and filter indicator gauge. Oil tank reservoir Oil level sight gauge and oil Temperature. Page 14 1/04...

This manual is also suitable for:

Aa4vg90