Skip to main content ↑ ↓
Topic: Hydraulic or water pump question (Read 480 times) previous topic - next topic

Hydraulic or water pump question

The shaft on the pulley of water pump belt broke and moved out. Can you help identify this part? The mechanic says he is having difficulty finding the part he needs to fix or replace it.
#18849
Rodney & Candace Stowers and Riddick the HuskyLab
1993 GV WE 36' U280 SBID, Build: 4218
Cummins Turbo Diesel 300hp C8.3L, Allison MT 647
Toad: 2017 Chevy Cruze, 6-speed Manual
Everyday is Friday!

Re: Hydraulic or water pump question

Reply #1 –
That is a hydraulic pump. These folks may be able to
Help you. NWRvsupply.com.
Bruce, Linda, and Macy
Zoey RIP 1/20/19
1999 U295 40' build #5400
2017 silver Jeep Wrangler, 1260 watts of solar on top
Moving around the country

Re: Hydraulic or water pump question

Reply #2 –
Correct, this is the hydraulic pump.  Not the water pump.

Is this the shaft that broke or did the water pump shaft break?

If water pump shaft, why does he want to do anything with the pump pulley?  Is it a belt alignment issue???
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Hydraulic or water pump question

Reply #3 –
Looks like there are bolts on the back of the pulley,have him remove the pulley and look for a part number.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Hydraulic or water pump question

Reply #4 –
Quote from: wolfe10 –
Correct, this is the hydraulic pump.  Not the water pump.

Is this the shaft that broke or did the water pump shaft break?

If water pump shaft, why does he want to do anything with the pump pulley?  Is it a belt alignment issue???

Yes, this is the shaft that broke.
#18849
Rodney & Candace Stowers and Riddick the HuskyLab
1993 GV WE 36' U280 SBID, Build: 4218
Cummins Turbo Diesel 300hp C8.3L, Allison MT 647
Toad: 2017 Chevy Cruze, 6-speed Manual
Everyday is Friday!

Re: Hydraulic or water pump question

Reply #5 –
Quote from: John44 –
Looks like there are bolts on the back of the pulley,have him remove the pulley and look for a part number.
Ok. Do you know if this is a fairly simple fix? I know that the pump will have to be replaced and not just repaired because of the shaft.
#18849
Rodney & Candace Stowers and Riddick the HuskyLab
1993 GV WE 36' U280 SBID, Build: 4218
Cummins Turbo Diesel 300hp C8.3L, Allison MT 647
Toad: 2017 Chevy Cruze, 6-speed Manual
Everyday is Friday!

Re: Hydraulic or water pump question

Reply #6 –
Removing the pulley should be simple if he knows how the pulley is attached to the shaft.  Brute force is not the answer.

Sadly, has been over 25 years since I have had to remove that pulley, so don't remember what to loosen to remove it, but once "discovered", was very easy.

 
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Hydraulic or water pump question

Reply #7 –
Quote from: stowers6 –
I know that the pump will have to be replaced and not just repaired because of the shaft.
You may not need to replace the pump...IF it is the same model as the pump on our '93 U280.  You may be able to replace the shaft.  See the link below for a report on my rebuild of our V10 hydraulic pump.  It's an old thread so I hope the links to parts sources are still good.

Vickers V10 Hydraulic Pump Rebuild

Vickers V10 pump shaft for sale | eBay


1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Hydraulic or water pump question

Reply #8 –
To remove the pulley from the shaft there are bolt holes on the face of the pulley close to the shaft, I think that they are 1/4 inch diameter. Screw in the bolts, think there are 2 holes. As you screw in the bolts it pushes the center of the pulley back which releases the cone that is clamping the pulley to the shaft.
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins

Re: Hydraulic or water pump question

Reply #9 –
Thank you for all the advice! We did not fix it ourselves. We had Coachnet tow it to TLC Fleet Service in Albuquerque. We were stuck on the road and I'm not a mechanic. These guys are really good, and they actually read the Foreforums for help in fixing our coach. They ended up replacing the pump assembly and installing a new U-Joint after the tow. Cost about two FT bucks total. Kudos to Coachnet for sending a tow company that knows what they're doing, and for suggesting TLC. We didn't like spending 8 extra days in ABQ because we were on our way to a job and not vacationing, but they got it done in good time.
#18849
Rodney & Candace Stowers and Riddick the HuskyLab
1993 GV WE 36' U280 SBID, Build: 4218
Cummins Turbo Diesel 300hp C8.3L, Allison MT 647
Toad: 2017 Chevy Cruze, 6-speed Manual
Everyday is Friday!