[w463G]

Hello All,

The connector on top of my vacuum cylinder has become disconnected.

Is it possible to buy the part (circled in red) and reattach it to the top and then reconnect the line, and if so does anyone know the part number? Can not seem to find it anywhere, in parts manual or various google searches.

If not possible would I need to buy a completely new vacuum cylinder assembly?

Thanks!

 

[w463G]

Hello All,

The connector on top of my vacuum cylinder has become disconnected.

Is it possible to buy the part (circled in red) and reattach it to the top and then reconnect the line, and if so does anyone know the part number? Can not seem to find it anywhere, in parts manual or various google searches.

If not possible would I need to buy a completely new vacuum cylinder assembly?

Thanks!

Also new member here, excited to join the forum!

 

[ianrandom]

Welcome to you. Filling in your profile is good to do, it's helpful for people answering if they can see your vehicle details easily. Year and model etc - Complete your Profile

 

[w463G]

Awesome, thanks for the heads up. Just added info on the G!

Looking forward to see if anyone has a suggestion/solution for this one!

 

[AlanMcR]

Awesome, thanks for the heads up. Just added info on the G!

Looking forward to see if anyone has a suggestion/solution for this one!

I very much doubt that the part is available seperately. I've had pretty decent luck using drip irrigation fittings and gobs of Epoxy to fix similar vacuum fitting problems. The plastic parts need to be very clean and oil free in order for the fix to hold. Also, since the vacuum system was opened up (broken fitting), I'd suspect that the associated vacuum switch is probably crudded up from road debris. Replace that too.

 

[w463G]

I very much doubt that the part is available seperately. I've had pretty decent luck using drip irrigation fittings and gobs of Epoxy to fix similar vacuum fitting problems. The plastic parts need to be very clean and oil free in order for the fix to hold. Also, since the vacuum system was opened up (broken fitting), I'd suspect that the associated vacuum switch is probably crudded up from road debris. Replace that too.

Are you referring to the pump (4635500183)? Looking at the diagram I'm not sure I know where it is, is it on the frame back behind the cylinders?

 

[AlanMcR]

What you linked to, A4635500183, is the backup vacuum pump. It hides somewhere in the right front of the engine compartment or behind the nearby headlight. That isn't what you had circled on the diagram. What you had circled on the diagram is called a pressure intensifier. It is essentially a tiny brake booster and master cylinder all bundled together. It provides the hydraulic force that engages one of the two axle lockers. Both of the pressure intensifiers are found under the G, near the transfer case.
Perhaps a photo would help?

 

[w463G]

What you linked to, A4635500183, is the backup vacuum pump. It hides somewhere in the right front of the engine compartment or behind the nearby headlight. That isn't what you had circled on the diagram. What you had circled on the diagram is called a pressure intensifier. It is essentially a tiny brake booster and master cylinder all bundled together. It provides the hydraulic force that engages one of the two axle lockers. Both of the pressure intensifiers are found under the G, near the transfer case.
Perhaps a photo would help?

My apologies, I think I quoted the wrong comment of yours. I have the new pressure intensifier, I was trying to get clarity on your comment around the vacuum switch I should replace as well. Thanks

 

[AlanMcR]

Just test the vacuum valves to be sure that they open and close correctly. The pipe has been open to dirty air under the truck, it is possible that enough dirt got sucked in to compromise the function of the valve. If the valves switches on/off when asked, I wouldn't worry about it any more.

If the valve is suspect, then finding a replacement is as simple as finding the part number on the valve. There were several versions of the vacuum valve setup. Some small parts like that aren't labeled, but one of the online EPC programs can probably be used to hunt down the correct part number.