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Author Topic: Hydraulic pump info?  (Read 271 times)

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Offline Mainecoast

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Hydraulic pump info?
« on: October 11, 2021, 08:13:10 PM »
So I have a 1985 mighty mite. Got it working pretty well now and sawed my 2nd log finally. When I release the pressure on the manifold and lower my idle..I can hear the pump start to make a grumpy noise. And then I kill the power and the pump letís out a loud squeal. Itís a Vickers Vtm 42..there are lots of other numbers and dashes after the 42. But has anyone rebuilt one of these? Or should I just send it off to get fixed up. 

Offline Southside

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Re: Hydraulic pump info?
« Reply #1 on: October 11, 2021, 08:32:18 PM »
Any thoughts @mike_belben ?
Franklin buncher and skidder
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Online mike_belben

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Re: Hydraulic pump info?
« Reply #2 on: October 12, 2021, 10:17:11 AM »
Its a vane pump, theyre pretty simply to take apart and inspect if you use a marker to keep tabs of how things go back together so you dont get them backward.  Vickers parts should be available and it might save a big pump replacement bill to catch the issue sooner than later.  Maybe a cracked vane holster or something like that.  

Glass and sandpaper soaked in wd40 is an easy way to freshen up end plates for a little more life.  

Could also be a drive coupling issue but you wont know if you dont get things apart
Isaiah 63:10

Offline Mainecoast

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Re: Hydraulic pump info?
« Reply #3 on: October 12, 2021, 06:07:37 PM »
Iím having a hard time finding parts and worried Iíll get the wrong things. I was quoted about 350 for a rebuild/seals at a hydraulic shop locally.. 


Offline Southside

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Re: Hydraulic pump info?
« Reply #4 on: October 12, 2021, 08:48:58 PM »
What does a new one cost? You can't beat a man at his game. If it's a good shop that's probably a more reliable solution than winging it.
Franklin buncher and skidder
JD Processor
Woodmizer LT Super 70 and LT35 sawmill, KD250 kiln, BMS 250 sharpener and setter
Riehl Edger
Woodmaster 725 and 4000 planner and moulder
Enough cows to ensure there is no spare time.
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Re: Hydraulic pump info?
« Reply #5 on: October 12, 2021, 10:44:31 PM »
Pretty sure a new one is around 750$..this being said it seems like there might be one on eBay refurbished for 350. Maybe I should get one of those and then rebuild myself when winter comes and have a back up. Not sure how often these go bad. Iím
Assuming the noise is only
Going to get worse. It seems to be building pressure just fine. I wonder if itís putting metal into my system. 

Online mike_belben

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Re: Hydraulic pump info?
« Reply #6 on: October 12, 2021, 10:53:52 PM »
Get a mechanics stethoscope and listen to the pump, be sure its inside.  It would suck to order a $$ pump and then when you pull it theres a $15 lovejoy issue and all sales final.
Isaiah 63:10

Offline Erik A

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Re: Hydraulic pump info?
« Reply #7 on: October 12, 2021, 11:04:38 PM »
Just guessing....

If the pump is worn, is the squeal fluid moving back to the low pressure side when it stops?

Do you think it is making noise with the idle up, you just canít hear it? 

Does the pump squeal only when still turning or continues after it stops ? Does it have belt that is slipping ?

If you idle down slowly do you get less grumpy noise or none?

If I were planning to take it in to a shop, I would open it first to see if I noticed something simple, take pictures and mark it before taking it apart (as stated above)

The funny thing is I would assume that if it was wearing out where it would send metal into the system, it would be louder with more throttle and pressure? 


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