[Healeys] Overdrive pump queries

[David Nock]

Smacking the check ball will not make a new seat in the pump. You must cut a new seat with a special reamer. 

David Nock

Sent from my iPhone

> On Aug 29, 2021, at 11:36 AM, Henry G Leach via Healeys <healeys at autox.team.net> wrote:
> 
> Simon- two things...did some of that "Plastic Metal" (JB Weld) that you found, get into the plunger/pump body and "weld" it together?  It (plunger) must move up and down with the action of the cam on the mainshaft to "pump" oil. (the wheel on the end should also be free to rotate)
> 
> Secondly, the new 1/4" ball you fitted to the pump body opening-did you smack it to seat with the body hole??...this is very important as if it does not seal perfectly, you will get "0" pressure. 
> 
> Yes, you can engage/disengage the OD with the lever, sans the solenoid. Hank
> 
> -----------------------------------------
> 
> From: "Michael Salter" 
> To: "Simon Lachlan"
> Cc: "Healeys"
> Sent: Sunday August 29 2021 5:58:01AM
> Subject: Re: [Healeys] Overdrive pump queries
> 
> To your question in 3.
> No when you put a rod up through the hole in the center of the pump body lower flange you will be pressing on the end of the piston which will move up and down as the overdrive is rotated.
> The spring merely holds the piston roller against the cam until pressure is established. 
> If the piston does not move up and down with no influence from that "rod" it is jamming in the body and this must be corrected.
> 
> M
> 
> On Sun., Aug. 29, 2021, 8:46 a.m. Simon Lachlan via Healeys, <healeys at autox.team.net> wrote:
>> Hi,
>> 
>> My overdrive is still driving me mad……
>> 
>>  
>> 
>> So, I’ve got it reassembled and have added the oil. About 3.5 litres was all it required so there must have been a fair bit still inside.
>> 
>> The solenoid is still in its box. Am I right in assuming(!)that one can switch the OD on manually with the lever on the RHS??
>>  
>> 
>> I ran the engine in 3rd for about 2 minutes whilst bringing that lever up, down, wherever. No pressure. How long does it take for the OD to produce pressure after the hydraulics have been reassembled?
>>  
>> 
>> With the pump in place and its two retaining screws tightened up, should one be able to move the pump’s piston up and down against the spring with a rod pushed up through that bottom bolt? (The bolt into which the filter’s bolt screws). Mine wouldn’t move at all. But wouldn’t that depend on the position of the cam??
>>  
>> 
>> One observation: The piston in the AH Spares accumulator wouldn’t move in/out with pressure from my thumb. The supplier, OD Spares, said that it takes a lot of pressure and oil to get that piston moving. Any thoughts on that??
>>  
>> 
>>  
>> 
>> I suspect that I’ve not managed to line the top of the piston up properly. Zero pressure.
>> 
>> I had pressure before this saga all started but it dropped drastically once the engine/gearbox warmed up. Hence the new AH Spares accumulator with bigger bore and new ball bearings and little springs etcetc.
>> 
>> I don’t believe that I’ve got anything (else!) wrong so I’m wondering about the pump……..
>> 
>>  
>> 
>> Simon
>> 
>>  
>> 
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