ABC pump bearing bad
Thread Starter
Senior Member
Joined: Oct 2015
Posts: 370
Likes: 30
E420
ABC pump bearing bad
Anybody replaced one or know where to get the new bearing? The pump has been replaced a year or two ago and works fine, just starting to make the belt squeal and pulley wobble slightly.
Last edited by E42AMG???; Jul 18, 2017 at 11:33 PM.
Junior Member
Joined: Feb 2017
Posts: 73
Likes: 7
2004 S600
Um, if the belt squeals and the pulley wobbles, I would say your definition of "works fine" needs to be updated. It's NOT fine. Mine was like that, and after pulling the pump, the bearings were so bad, I'm amazed it hadn't already exploded. I would guess that mine was going to frag and strand my car within the next 200 miles. You need a new pump, ASAP. Replace the belt while you're in there.
MBWorld Fanatic!
Joined: Dec 2012
Posts: 2,474
Likes: 439
From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
Most (but not all) bearings are identified by numbers etched into the races. If you disassemble your pump, you will determine several things:
- Can you remove and replace the pump yourself?
- Do you want to do so?
- Can you disassemble the pump?
- Is the bearing marked?
- Can you source the bearing? (Rarely, you will find that the bearing is not commercially available. Most are readily available from a bearing supply house or industrial supply house.)
- Can you get everything back together, bleed the system, etc., etc.?
- Is this such a PITA that next time you will buy a new or rebuilt pump?
- Can you remove and replace the pump yourself?
- Do you want to do so?
- Can you disassemble the pump?
- Is the bearing marked?
- Can you source the bearing? (Rarely, you will find that the bearing is not commercially available. Most are readily available from a bearing supply house or industrial supply house.)
- Can you get everything back together, bleed the system, etc., etc.?
- Is this such a PITA that next time you will buy a new or rebuilt pump?
Thread Starter
Senior Member
Joined: Oct 2015
Posts: 370
Likes: 30
E420
Most (but not all) bearings are identified by numbers etched into the races. If you disassemble your pump, you will determine several things:
- Can you remove and replace the pump yourself?
- Do you want to do so?
- Can you disassemble the pump?
- Is the bearing marked?
- Can you source the bearing? (Rarely, you will find that the bearing is not commercially available. Most are readily available from a bearing supply house or industrial supply house.)
- Can you get everything back together, bleed the system, etc., etc.?
- Is this such a PITA that next time you will buy a new or rebuilt pump?
- Can you remove and replace the pump yourself?
- Do you want to do so?
- Can you disassemble the pump?
- Is the bearing marked?
- Can you source the bearing? (Rarely, you will find that the bearing is not commercially available. Most are readily available from a bearing supply house or industrial supply house.)
- Can you get everything back together, bleed the system, etc., etc.?
- Is this such a PITA that next time you will buy a new or rebuilt pump?
I can do anything and everything.
Newbie
Joined: Jul 2022
Posts: 2
Likes: 0
1998 amg c43
