Can someone clue me in on the torque settings? I looked through the manuals and could not find them.

 

Some figures on page 11

 

Which is which? So I am looking at the specs to return the pump to the "adapter" or the engine? Kind of confusing

 

Yea I noticed that before but ,,,,,,,,,,,,,,,,,,

Adaptor is internal coupler ?

Last 2 lines ,

Power steering pump to adaptor ( housing ) ?

Power steering ( assembly ) to engine ?

Luckily there are only 3 assembly plains but I can be wrong until looking at a assembly expanded view I once saw

 

So I guess you are unsure also?

 

Yes

 

I guess what I am looking for is the adapter to the engine.

 

Bolt # 6 ?

Standard engineering practice of the thread size considering bolt threads into the aluminum block with or without Heli-Coil inserts

The standard practice would be tabled somewhere

 

Busy first reference

But you can use the process of elimination of the Jaguar factory list you have a pic of

Torque-Tension Reference Guide.pdf (fastenal.com)

And , but they are listing as the critical factor is the bolt # and not the base it threads into

FG-tightening-torques.pdf (hackneys.com)

 

Looks like it is 22-28. I am glad I looked because I thought it might have been pump to adapter since there is an "adapter" where the pump fastens to the engine.

 

The reference to the bolt shearing if over torqued is a misunderstanding.

On aircraft engines they would have a stud ( reversed thread pointing direction ) to put an oil filter assembly on the engine gearbox with a torque collar sheer nut that will sheer off

the sheering off would be your witness that the sheer collar nut was installed correctly , minus the fact you can cross thread it

Steel Bolts into Aluminum Torque Specs - Welding, Bonding & Fastener engineering - Eng-Tips



These shear nut collars were used mostly in aircraft sheet metal applications

 

A mixing of terminology as the adaptor ( coupler ) is inside the adaptor housing

In aircraft , we had a form and back stepping process to follow ( if there was a error ) before the logbook airworthiness signature can be signed before the aircraft can fly

Had some fights on that to be right for the aircraft and passengers

This would ensure the paperwork followed and signed as a legal mater was in absolute compliance, so it had to go back through the manufacturer or an engineering release by an engineer qualified in the area of concern

 

I must agree, very confusing. Looking at the exploded diagram, (6) are the washer faced setscrews which attach the adaptor to the engine. The required torque is 22-28Nm and as the service manual states “Power steering pump to the engine”, seems logical.

The two washer faced setscrews (4) are what holds the adapter to the actual pump housing. They screw into two 8mm bolts with 20mm long spacer heads. These bolts/spacers are not identified on the exploded diagram and actually hold the pump housing together in addition to another two 8mm bolts (also not identified on the exploded diagram) holding the pump housing together so we have four 8mm bolts holding the pump housing together.

Perhaps these bolts together with (4) washer faced setscrews perhaps all require 44.5Nm and are referred to as “power steering pump to adaptor”.

This leaves us with “Adaptor to housing”, does this perhaps relate to the two washer faced setscrews (4) to be torqued to 21.5Nm and not 44.5Nm as I previously assumed.

Unfortunately, we have only two set screws mentioned in the exploded diagram (4 & 6) but have three torque settings given.



John Herbert

1996 XJR

 

See line 10 below the note box

That would be the 2 bolt pairs , # 4 in the parts illustration , adaptor to pump , 12.5 - 17 lb ft (17 - 23 Nm).

10-04 PAS Pump tool.pdf (jagrepair.com)