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My cat 301.5 has lost all hydraulic functions whilst in work . no oil leaks/hoses burst , no noise , not overheating.good hydraulic filter(recent)no fuses gone - any ideas?

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Check the armrest safety switch is engaged fully .Gets lose with wear.

Posted on Dec 31, 2009

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2000 crv honda just got a new timing belt and water pump after a couple of days now it make a noise (loud clicking noise) when I start it up


The noise you describe may be due to hydraulic tappet leak back form a oil that is of the incorrect viscosity or a cheap oil filter that doe's not have an anti leak back valve in it .The noise is until the oil pressure builds up and makes the hydraulic tappets work properly.

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Oil coming from bottom of 1996 ford contour. No leak from the motor


If you have recently had your oil changed,the oil filter may be loose or cross threaded.Also if you have had an oil change recently it could just be spilled oil. Make sure your oil filler cap is on tight and the dipstick is on tight. While you are at it check to see how much oil you have actually lost.If it`s not coming from the engine,i would inspect the oil pan gasket and the oil pan itself may have a hole in it.

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My recently purchased used MT180HD tractor will not move. I replaced all hydraulic oil,checked the clutch,and adjusted linkage. What next??? Are my hydraulic pumps bad?? Can a mechanical transmission be...


hi there joedorava

is there input to pumps , are there any leaks in the system either oil / air

have you purged all the air from the hydro units and wheel motors

if air is entraineed in oil , you may get alot of noise from caviatation in the pumps and wheel motors also heat , and vibration and no movement until all the air is gone
top up oil to correct level

caviatation can be quite destructive on pumps etc

i assume you used the correct hydraulic fluid for the unit in question

have you checked changed hydraulic filters when changed hydraulic fluid ?

other than that cant give any more info

cheers pauly46


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1996 Motorguide Brute 765 problems with motor and clicking head coming out from head


sounds like a hydraulic tappet ,try my trick as sometimes it works ,firstly add a 3 good squirts of fairy liquid to engine oil and a half litre of diesel ,has to be fairy and not a cheap brand by the way .Then run engine for a couple of days and the noise will lessen,then change oil and oil filter and use a diesel engine oil suitable for turbo diesel or petrol engines ,cheapest you can buy for this no fancy long life oil ,run engine on this oil diesel oil as it contains detergent and this will dissolve the clag inside the engine and the hydraulic tappet ,change oil 5/6000 miles and by this time it should have lost the noise ,then change oil regular max 6000 miles with a oil filter every third oil change and you shouldnt have any more probl?ems

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Check hydraulic fluid and ensure it is at the proper level - Still have the problem

Check hydraulic filter...may be clogged.

Check hoses and ensure there're no leaks.

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Car overheat frequently and at time the engine sound is very loud


Several things can cause this overheating. Have you recently done a:
1. Check Hoses for Leaks
2. Check Radiator for Leaks --- Also, Change Radiator Cap ( can loose pressure there if
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3. Check Water Pump for Leaks. If Water Pump is bad, you will hear a loud noise from it
4 Complete Tune Up? Should be done at least 1x a Yr. Depending on how much you drive the Vehicle. Includes: Plugs, Plug Wires, Gas Filter, Air Breather Filter, PCV Valve, Adjust Timing,
Check Belts -- see if worn
5. Changed your Thermostat & Gasket and have the correct degree Thermostat in the Vehicle?
6.. Had your Radiator Rod and Cleaned out?
7. Temperture Sending Unit (located near Thermostat) could be bad
8. 02-Sensor (Generally located in the Exhaust Manifold - needs a socket with a space in it
to allow the Socket to fit over this top wire of the 0-2 Sensor )
9. Change oil and oil Filter.
10. Change Gas Tank Cap ---

Do all this yearly ( except the Radiator Rod & Clean ( do every 2-3 yrs), and you should not have
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Overheating and now engine 'clicking noises.


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still overheating? have your top head checked - warped head, valves, valve seats, etc. You might need to have your engine's compression checked if it is still within specs.

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