From: Ron (rojoha@attbi.com)
Date: Sat Apr 06 2002 - 00:24:23 PST
Usually your first indication of seal failure is oil inside your inner
rear wheel or front wheel. The oil gets there by flowing out the axle to
the wheel hub, where the outer seal is supposed to stop it. It then goes
past the seal and into the hub space where the bearings are and washes the
grease out of the bearings. Then it goes past the inner seal and hopefully
gets caught by the slinger plate in the brake drum and channeled out the
weep holes around the brake drum. If the holes are plugged by dirt or rust,
the oil makes it to your brake pads. Make sure the holes are cleaned out
before reassembly.
When you put the outer seal on, you should cut a wedge shaped piece of
rubberized cork valve cover gasket to fit in the slot and be compressed
under the bearing by the tang on the seal. A SMALL dab of silicone sealant
in the keyway wouldn't hurt. To much silicone could get into the bearing.
When I reassembled mine, I cut more, gasket material to fill the keyway
under the nuts with the tab on the lock plate pushing the gasket under the
inner nut and the keyway under the outer nut and the threads lightly filled
with silicone sealant. The idea being to keep the gear oil from getting into
the bearing area.
All of the axle and inner hub surfaces inside the seal 'chamber' inside
the hub should be lightly coated with grease before reassembly to prevent
rusting.
Do not overfill the differentials because the oil will flow out to the
hubs. If your vents are plugged, the pressurized gear oil will be forced out
through the seals, rinsing the bearings of grease and come out the weep
holes in the drum (you hope) and onto your wheels and tires.
This is a serious problem that needs to be repaired as soon as possible.
I was told to just make sure I kept checking the gear oil level and topping
it off and I'd be fine. NOT TRUE since the bearings are getting the grease
flushed out of them. They want grease in them, not oil.
That is why you find all the little rabbit turd round balls of grease in
side the hubs. The grease gets washed out of the bearings and the oil soup
inside the hub keeps the little balls rolling inside the hubs while you
drive.
Ronzo
----- Original Message -----
From: "Jim Newton" <jnewton@laurel.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Friday, April 05, 2002 10:27 PM
Subject: [MV] M35A2 Brakes -- Grease On Shoes from Seal? (Long)
Hi List...
OK...HERE'S MY QUESTION:
========================
I've had weak brakes on this deuce since I've owned it. When I pulled
the brake drum off, the brake shoes were coated with what looks like
wheel grease. Is this greasy substance actually grease from the inner
seal behind the inside taper bearing, or is it burned up coagulated
gear oil from the second seal behind the backing plate that keeps gear
oil from the axle and pumpkin from leaking through to the drum?
I cleaned this greasy substance off the shoes and from the drum with
Brakleen, and the brakes work so much better I can't believe it (duh!
What a surprise, eh?). I'm sure the other side's front brakes are
greasy too, so I'll try to clean those up
I'm glad to have the new studs on and have the deuce operational again
(thanks again, Gene) since I will be taking the deuce to the MVCC meet
at Big Bear trip next week and our club's first desert combat camping
sim the following weekend (www.cimmerians.com).
On May 25, we will be loading up the deuce to take all the kids in our
Cub Scout pack (Pack 83 in Belmont, CA) to the Golden Gate Memorial
Cemetery in San Bruno, CA to place US flags on the graves of our US
veterans. After that, it is off to the Cub Scout pack Family Camp.
That same week in May, our BattleBots team will be using the deuce to
take our 3 robots to compete in BattleBots on Treasure Island in San
Francisco! My deuce is going to be very busy the next month or so!
Has anyone had this grease-in-the-brakes problem with their M35A2? If
so, how did you solve the problem?
I'm actually relieved to find that this is the problem...I was afraid
the air pack or master cylinder might be bad. But when I bled all the
air out and tried the brakes, they were REALLY bad so I figured the
air pack and master cylinder were doing their jobs fine.
Thank you all as always!
--Jim "Ike" Newton
o 1984 M1007 CUCV Military Suburban 6.2 Liter Turbo-Diesel Engine 5/4 Ton Cargo Capacity, 4WD
o 1971 M35A2 Military Troop/Cargo Truck "Deuce and a Half" 478 Cubic Inch Turbo-Diesel Multi-Fuel Engine Air Shift Front Axle 2 1/2 Ton Cargo Capacity, 6WD
See them at: http://www.CUCV.net
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