Nissan Patrol 4x4 (Africa)

Tiny, the pump doesn't have any timing marks on it, just (if I recall ) a large gear that runs off the rest of the gears inside. So just a matter of removing the bolts, clean the area and replace the O-ring, slot the pump back in and re-bolt.

Cedric, thanks for the info, much appreciated.

Gatorback fan belts fitted my 1999 4.2 perfectly, the belts fit as below;
PG 468 - Air Con
PG 480 - Steering
PG 476 - Alternator

Bought at Midas

Does the tb42 use the same belts as the td42?

Not all of them.