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Columbia Concrete Products

1/04

Page 9

HYDROSTATIC PUMP

CHECKING  THE  OIL  TEMPERATURE

1. Maximum oil temperature should be 140ºF (60ºC).
2. The oil heater should be set to activate at an oil temperature below 100ºF (37.8ºC)

If adjustments on temperature are needed remove heater cap

and set dial to desired temperature.

3. The oil cooler has a fixed thermostat that is activated when temperature reaches

110ºF.

4. For cold weather start-up, always engage the vibrator several times to get the warm

oil circulating through the motor.

5. There is a high temperature cut off if the oil temperature rises above 150ºF. This will

shut down the pump.

6. Check the oil temperature at least once per shift. Record the value to understand the

normal oil temperature. If the oil temperature is above normal the system may have a

problem.

Items to check:
• Is the cooler on? If not, check the thermostat it may have failed. Also check the

fuses. If the thermostat is good, check the oil cooler three phase lockout and the

start overloads and fuses. If all are good then check the oil cooler motor.

• Is the heater set too high or not shutting off? Remove the heater cap and check to

see what the temperature is set at.

• Acceleration or deceleration relief valves stuck? Check acceleration and deceleration

relief gauges. The pressure should drop off once the vibrator has started or stopped.

• Pump starting to fail? Check case drain line from pump to return header. If it is hot to

the touch, too much oil flow is passing through the case drain. Charge pump

pressure will drop off. Check the vibrator motor case drain. Check the high-pressure

filters. If plugged the filter indicators will show red. Change filters and reset filter

indicators by pushing the reset on the filter indicator. Check the charge pump filter. If

plugged, filter indicator will show red. 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.

NOTE

Содержание AA4VG71

Страница 1: ...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...

Страница 2: ...ON This manual provides information applicable to the Columbia Block Machine 16HF 1600 manufacturing systems equipped with the Hydrostatic drive CONTENTS Adjusting Relief Valves 2 FineAdjustment 4 Cou...

Страница 3: ...wrench On 125 and 180 to be done with a 5 mm allen wrench and a 17 mm box wrench For new pump replacement check to ensure that the orifice plugs in Port X1 and Port X2 have been removed If orifice plu...

Страница 4: ...set at 2500 psi For the AA4VG71 and AA4VG90 one turn equals 2200 psi 150 bar 6 Remember one complete turn clockwise on AA4VG71 and 90 equals 2200 psi 150 bar 7 Make sure that the POR valve is not in...

Страница 5: ...f the gauges increase in pressure Turn the adjustment screw the opposite direction and the other gauge will start to increase in pressure Turn the adjustment screw back until both gauges read the same...

Страница 6: ...ill notice gauges installed in Ma and Mb ports these are the two outside gauges which we refer to as acceleration and deceleration which you will be reading for the following procedures You do not hav...

Страница 7: ...ID The port sizes are as follows Size 28 90 7 16 20 UNF Size 125 250 9 16 18 UNF Pump Size Allen Wrench Wrench 28 56 6 mm 19 mm 71 90 6 mm 24 mm 125 250 8 mm 24 mm With pressure gages installed at Ma...

Страница 8: ...ge Pressure Relief Valve Adjustment ForAA4VG28 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...

Страница 9: ...TIC 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...

Страница 10: ...If the thermostat is good check the oil cooler three phase lockout and the start overloads and fuses If all are good then check the oil cooler motor Is the heater set too high or not shutting off Rem...

Страница 11: ...motor 5 Case drain return from hydraulic motor 6 Gate valve shut off 1 2 3 4 5 6 1 Deceleration pressure MA 2 Charge pump pressure G 3 Acceleration pressure MB 4 Return filter high pressure 5 Heat ex...

Страница 12: ...mp 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 2 3 4 5 6 7 1 2 3 4 5 7 8 1 Fan motor 2 Fan switch 3 Low oil 4 Over...

Страница 13: ...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 r...

Страница 14: ...egrees Part 2327616 2 Low oil switch shut down Part 237089 3 Over temperature 150 degrees shut down Part 232618 2 Low Oil 3 Over Temperature 1 Fan Switch High pressure pump filter Heat exchanger motor...

Страница 15: ...Columbia Concrete Products Page 14 1 04 HYDROSTATIC PUMP Return Filter and filter indicator gauge Oil level sight gauge and oil Temperature Oil tank reservoir 40 50 HP Hydrostatic Pump Unit...

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