Author Topic: Brake Air Regulator or blow off valves?  (Read 2647 times)

Offline Diana Alan

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Re: Brake Air Regulator or blow off valves?
« Reply #15 on: September 07, 2017, 12:07:41 AM »
Today's update, have fitted another overhauled wheel cylinder ready to bleed and replacement shoes for fitting but have been having trouble finding the hub seal.  Even Iveco (Sydney Trucks & Machinery) were unable to supply although they were very helpful in their attempt. Am hoping a bearing service will come through with their promise to supply from measurements of the old seal even though they say it's unlisted.

Will see tomorrow afternoon.
REMLR 240.
Perentie FFR 50-422, SIII FFR 30-146, SIIA GunBuggy 112-726, Mk3 Inter 170-437, ex-SADF SIIB/SIII Radio Relay,
Army Trailers: No5 x 2, W/S x 2, PT1-1.2, Horndraulic ATR dog trailer.
Civilian: MY85 RRc HiLine 4.6, MY51 ex-RACQ 80", MY91 Defender/Reynolds Boughton 6x6, MY12 D4 SDV6

Offline Ravvin

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Re: Brake Air Regulator or blow off valves?
« Reply #16 on: September 07, 2017, 08:21:22 AM »
If its the seal in the nut pictured below, have them look up Victor 49346 as a cross reference.



It was also fitted to 1934 to 1942 GMC AC & AF450, 500 & 550 trucks.

The 2 links below are to current US ebay listings.

http://www.ebay.com.au/itm/WWII-International-Harvester-IH-M-5H-6-M5H6-2-1-2-ton-Rear-Axle-Seal-Kit/360483405541?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

http://www.ebay.com.au/itm/CR-Services-Chicago-Rawhide-25935-Oil-Seal/282482550557?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

If it's the big seal at the back of the hub that stops grease leaking out, my local bearing place had 2 in stock, just going by the measurements, and got the other 2 in overnight. He said they are a common size, used in older machinery.

One cross reference they can look up if they can't use the measurements is a Bosch Chassis Systems Aust part # P3920.

If that's the seal you need and they can't find anything, I can call into my local place after work and get a current number off him for you.
Mine were Federal brand, from memory. Wish I had written down the part number.

Edit: Ok called into the bearing place and the seal for the back of the hub is a National 415697. I looked the number up on the Timken cross-reference page and they use the same number. So either National or Timken 415697. If you can't get those, the SKF 38713 is also compatible.


Greg.
« Last Edit: September 07, 2017, 05:14:41 PM by Ravvin »

Offline Diana Alan

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Re: Brake Air Regulator or blow off valves?
« Reply #17 on: September 11, 2017, 11:33:02 AM »
Managed to get the hub seals from a local specialist bearing service, the salesman said that the seals were unlisted on his computer system but had no problem ordering them in by size and they arrived overnight.

All fixed and running, so the truck was able to be used for the scheduled packing up the gear for our event next weekend.  Seems to like a lot of excess work doing a 160km round trip for an event that's just on 20km from where the truck lives.
REMLR 240.
Perentie FFR 50-422, SIII FFR 30-146, SIIA GunBuggy 112-726, Mk3 Inter 170-437, ex-SADF SIIB/SIII Radio Relay,
Army Trailers: No5 x 2, W/S x 2, PT1-1.2, Horndraulic ATR dog trailer.
Civilian: MY85 RRc HiLine 4.6, MY51 ex-RACQ 80", MY91 Defender/Reynolds Boughton 6x6, MY12 D4 SDV6

Offline Ravvin

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Re: Brake Air Regulator or blow off valves?
« Reply #18 on: September 11, 2017, 02:46:24 PM »
So were the seals the ones on the back of the hub, that stop the grease getting out, or the ones that fit inside the nut that locks the bearing load nut, that seals against the inner face of the axle flange?

Greg.

Offline Diana Alan

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Re: Brake Air Regulator or blow off valves?
« Reply #19 on: September 11, 2017, 03:15:44 PM »
The ones at the back of the hub to stop the grease getting out. 

I decided that even if the ones at the front weren't sealing all that would happen is the oil would get around the stub axle and mix with the grease.  The main seal at the back of the hub should prevent both the grease and any oil leaking out, particularly as the supplied seals were double lipped.  Its the same as the design on the rear hubs of a series Land Rover which are oil lubricated in common with the diff oil.
REMLR 240.
Perentie FFR 50-422, SIII FFR 30-146, SIIA GunBuggy 112-726, Mk3 Inter 170-437, ex-SADF SIIB/SIII Radio Relay,
Army Trailers: No5 x 2, W/S x 2, PT1-1.2, Horndraulic ATR dog trailer.
Civilian: MY85 RRc HiLine 4.6, MY51 ex-RACQ 80", MY91 Defender/Reynolds Boughton 6x6, MY12 D4 SDV6

Offline john.k

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Re: Brake Air Regulator or blow off valves?
« Reply #20 on: September 17, 2017, 10:54:19 PM »
You might be interested to know that the seal in the outer nut is the same as fitted to the No3 Eaton used in Inters.The nut thread is finer,and not I/C,but the seal is /was available as a separate part to the nut.I have looked in the Isuzu engine manual,and the compressor fitted is only a single cylinder,and it unloads in exactly the same way as the Westinghouse.The W/hse governor bolts to an airway on the Tu-Flo compressor,but can also be mounted remotely,as its threaded 1/8 NPT in the air passages,and connected with pipes.So the W/hse governor can be used with the Isuzu compressor.The cylindrical valves on the air tanks are actually "safety valves" and set to relieve at 150psi in a normal system.Its not that uncommon for sleeved cylinders to leak,cause a lot of the machining is woeful,and Loctite used to close up the gap.