[Healeys] Overdrive pump queries

[David Nock BCS]

Remove the overdrive drain plug to get access to the pump. Then remove the large plug on the bottom of the pump, you will be able to see the bottom of the piston. Then rotate the drive shaft and with a long screwdriver on bottom of the piston you will be able to see if the pump is moving up and down. 


David Nock
British Car Specialists
209-948-8767
www.britishcarspecialists.com

From: simon.lachlan at alexarevel.plus.com 
Sent: Monday, August 30, 2021 5:30 AM
To: gradea1 at charter.net ; 'David Nock' 
Cc: 'Healeys' 
Subject: RE: [Healeys] Overdrive pump queries

Hi,

David has already steered me in the right direction with regard to the reamer.

 

And a further query…..

It seems very likely from what I confront in my car and from the advice received to date – for which many thanks -..it seems very likely that the issue is caused by the pump plunger being stuck or, I suspect, not quite orientated.

Despite what you guys suspect by now(!), I study form religiously before I delve into these things and have been brought up short by a section in the BMC manual, Section G8, “Pump Valve”. One is told how to put the “pump body” back in using one of many mythical special tools and then the manual addresses the insertion of the “plunger” (piston):- “The pump plunger is prevented from rotation when in position by a guide peg carried in the front casing. When assembling the pump, the plunger should be inserted with the flat on its head facing the rear of the unit. It is possible to guide it past the guide peg by means of a screwdriver inserted through the side of the casting”.

  1.. Can that procedure be carried out when the OD is still in the car as is implied by the manual? 
  2.. If so, where is the access point through which one can insert a screwdriver? (Strikes me that oil would gush out…..If the pump ever restarted pumping!) 
  3.. If not so, is there a trick involved in getting the plunger up and correctly sited?
 

Simon

 

 

 

From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Henry G Leach via Healeys
Sent: 30 August 2021 01:57
To: 'David Nock' <healeydoc at sbcglobal.net>
Cc: 'Healeys' <healeys at autox.team.net>
Subject: Re: [Healeys] Overdrive pump queries

 

David-help this guy out here...he is getting desperate! He has been at this project for months and can't get enough pressure. What size reamer and where can he get one?  He lives in UK.  Thanks, Hank

-----------------------------------------

From: "David Nock" 
To: gradea1 at charter.net
Cc: "Michael Salter", "Healeys"
Sent: Sunday August 29 2021 12:28:02PM
Subject: Re: [Healeys] Overdrive pump queries

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

 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20210830/c3c628eb/attachment.htm>