spring lengths for lift-all pump

riverbend · Mar 19, 2011

Replacing all the springs fixed the problem with the pump control rod being 'out of time' on my H. The hold up ball springs were both short. One was 3/16" shorter than the other. The valve cam and piston lever spring had a cracked leg (it is a hair pin type spring with several coils).

The free length of the Hold up ball springs (pn 15056E) are 1.125".
The Locking clip spring (pn 15257E) is 1.525" long.
The pressure relief valve spring (pn 15258E) is 1.90" long.
The arms on the Valve cam and piston lever spring (pn 15068EB) are bent back 3/8".

This spring (15068EB) has several coils and at each end, instead of a hook or a flattened coil, there is an arm that extends tangential to the coils (see the illistration in the parts book). If you put a straight edge along the back of one arm, the end of the other arm, at the back of the arm is 3/8" below the edge of the ruler.

Greg

big a · Mar 19, 2011

I think I am going to have to go into my LiftAll on my M soon. Were these springs still available from CIH, or where dI'd you source them?

riverbend · Mar 20, 2011

They all came from the local IH dealer. Everything but the valve cam piston lever spring had to be ordered. It took 3-4 days for them to come in. I can't imagine why they had the vcpl spring in stock.

Greg

pete 23 · Mar 20, 2011

That 15068EB spring is the one that breaks and goes through the gears and often destroys gears and body so it is normally replaced when pump is apart if it has the original style lighter spring. If a pump has shims under body they are used to control end play on gears and one should remove as many as possible and still turn pump. Some later pumps used needle bearings on shaft but I always found the bushings gave better control of side play and therefore clearance between body and gears under pressure. All more modern pumps have pressure applied to the end of gears and therefore can deliver fluid under greater pressure. One has to keep in mind that a pump may very well be able to reach relief valve pressure while deadheaded but not be able to deliver sufficient gal per min to do a job due to wear on gears, body and end plates. When we got a flow rater in shop we could readily find out just how poor those old pumps actually were and wonder how they did their job as well as they did.

spring lengths for lift-all pump

riverbend

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big a

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riverbend

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pete 23

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