5 replies to this topic

[Mort]

We have a R600. What is the correct way to do a gear shift from 2high to 3low? We used to be able to flick the switch then change the gear. Recently this does not seem to work as well as changing the gear then flicking the switch just before releasing the clutch. Do we have an air related problem?
On the stick there are 6 hoses numbered 1 to 6. On the gearbox there are 2 cylinders one larger than the other. they have numbers 1 to 4 on them. where should 5 & 6 go to. Which cylinder is low high.What is inside these cylinders? Do they have rubber seals that wear out?

The air goes though pressure reducers, can these cause problems?

Any help greatly appreciated.

Ian

[MACKS]

I flip the splitter when in neutral,change the air filter on the trans see if that helps..

[j hancock]

Should have one line for air supply and one exhaust if I am thinking right this morning.

There is a rebuild kit for this setup with little o rings, etc. Water in the system won't help anything so change the filter. Water may have already done a little damage and made the system "sticky".

The pres. adjustment should be about 65 psi. any more can damage the forks inside the case.

Jim

[Mort]

This raises another point. I don't think the air filter is connected properly as there seems. Can you tell me how it is supposed to be plumbed in. If there is water damage what am I looking for?

Thanks so much for the input guys. I am having trouble getting this info locally!

[j hancock]

The air filter should receive air from the truck dry tank and then it will go to the supply port on the gear shift select lever inside the cab.

If water is present it could make the pistons to change the trans. forks act slowly or sticky. Rust can form which can also slow things down. If rust gets to bad then it can degrade the o-rings inside and then air will leak by the piston. When things are leaking really badly sometimes the air regulator is bypassed so more air psi is put into the system to make up for the leaks.

The little air regulators are to keep the psi around 65 so the forks don't get screwed up. When the problems then take over and the pistons aren't working freely, full 135 system pres. keeps the truck working but it is just going to get worse.

Jim

[84superdog]

I have been there with the slow shift I changed the filter added an air dryer to the truck and rebuilt the shift solenoids there was corrosion and what I would call mud in the solenoids I think that was my problem but Mack did not stock that filter and had to order me a case of them.