What did you do to your Patrol today!

[PeeBee]

Found some old 'Wee Willem' type cigars in the house to start investigations on a first ever experienced vaccuum leak arisen. Snow temps do weird things to trucks/parts! Thanks YouTube :-)

What are the symptoms Mark? can you hear air entering the system, or spongy brakes/clutch?

[MB]

Zero assisted brakes & clutch mate when the low 550rpm idling donk is at rest ;-)

[PeeBee]

Zero assisted brakes & clutch mate when the low 550rpm idling donk is at rest ;-)

Hope its not that new alt/vac pump?

[MB]

In theory it can't be mate. Heel & Toe to rev up its double vac power works a treat :-) When revs are 'off' she's a rolling lump of steel that also needs synchronised box tricking down ;-)

[PeeBee]

In theory it can't be mate. Heel & Toe to rev up its double vac power works a treat :-) When revs are 'off' she's a rolling lump of steel that also needs synchronised box tricking down ;-)

Where does the 'displaced air' release to on your set-up? Is there a sticky check valve of sorts that is not closing under low pressure, but working under high pressure?

[MB]

I'll go check :-(

[nissannewby]

Zero assisted brakes & clutch mate when the low 550rpm idling donk is at rest ;-)

Auto time with hydraulic assisted booster

[MB]

Love ya Mat mate, Cracka ;-) You know I'm a simpleton stubborn dumb old clutch bloke :-) Phil mate, I cannot find any vac dump type valve anywhere bro. 1999 converted BD say still running stock 4.2T twin vac cannisters. All roads/pipes lead to brake/clutch boosters.

[nissannewby]

Love ya Mat mate, Cracka ;-) You know I'm a simpleton stubborn dumb old clutch bloke :-) Phil mate, I cannot find any vac dump type valve anywhere bro. 1999 converted BD say still running stock 4.2T twin vac cannisters. All roads/pipes lead to brake/clutch boosters.

Is the pulley on your new alternator larger than the item it replaced?

[MB]

Near identical size mate, been running perfect until -10C temp trip :-(