Dieselfixer

Hi All

I'm having a bit of a brain freeze here. Working on 95 CH613, Builds 120 lbs primary air but only 100 lbs secondary. Secondary comes up slower than primary. Truck has 2 air tanks mounted in front of the right fuel tank. AD9 drier, no check valves that I can see. Ideas?

Thanks for the replies, I sent the 1st sample to Castrol's Labcheck. I sent another today to the local Caterpillar dealer here. I'll see what it comes back as. I do have a bulk oil tank here but I have 17 other trucks running on the oil from the same tank and they are fine.

Hi All;

I have a problem with a RD690S that is got me going a bit crazy. The truck came in with low oil pressure. I checked the oil level and it was way up on the stick and Very thin. I was not sure if the driver may have added hydraulic oil to it instead of 15/40 motor oil so I changed the oil and filters and the oil pressure was back to normal.

About 9 days later it did it again, oil very thin, way up on the stick and low oil pressure. I sent a oil sample out expecting to have it come back with a load of fuel in it. The sample came back with <1.0 fuel, < 0.1 water, and neg glycol. Anyone have any ideas on this problem? I'm going to send another sample to a different lab and see if it comes back the same as the 1st sample. Thanks

Hi All

Does anyone know what the normal oil pressure is for an E7-300 engine? I have 1 here that is only showing 15lbs at cold start. I think it is way too low.

The adjustment is pretty much the same, remove the lock plate, hold the pedal down and turn the "lugs" on the adjuster ring clockwise to increase freeplay.

There is a tool for adjusting that style. http://www.amazon.com/OTC-7028-Clutch-Adjusting-Wrench/dp/B0002SREQS

any pics of the hood? Any idea of the year truck it will fit?

Hi All

I have a 06 CHN613 that has a leaking exhaust manifold gasket. There is a sticker on the air intake line that says you have to be certified by the North American Institute to work on the injector lines and if they are removed they must be replaced. Anyone ever had any experience with this? I have to remove the injector lines to replace the manifold gaskets but I see no reason to have to replace all of the injector lines. The truck has the 460 engine in it.

Yep thats where it is. When you change the thermostat be sure to change the seal that is in the housing.

Hi all

Having a problem with a 95 CH613 headlights. The problem is no low beam headlights. Tried changing the hi beam switch(turn signal switch) Checked bulbs, checked fuses. I have no wiring diagram for this truck. Only high beams work. Any ideas? Thanks.

Well, after being sick for almost 2 weeks i finally got to mess with the truck a little today. I replaced the Headlight switch, courtesy switch, dimming switch, all the pertainent relays, the pertainent breakers. I cut out the old spliced rear light harness. I added a junction box in the rear with the trucks "factory 4 wire rear harness" in and 7 wire out to the trailer connection.

The breaker / relay will not trip now. and the forawrd lights work correctly, so i think the problem was in the old spliced harness i cut out. But I haven't hooked the rear lights up, as I ran out of eyelets. I noticed this truck has a 4 wire rear light harness instead of 7 wire... is this normal?... The truck only has red, black, white, & brown rear light harness. The mack rd basic wiring diagram #8-50 I found online shows the rear lamp wire colors including green and yellow for the directionals, like the regular 7 wire trailer wire. Although, the wiring diagram also shows a small 4 stud terminal strip with green, red, black, & White going to the rh and lh stop,tail,dir,& backup lights with the black wire splitting to both lamps. So is the 4 wire red, black, white, & brown rear harness corrct?, if so, which will connect with the 7 wire? The diagram shows the 7 wire as: yellow - left directional, green - right directional, clearance - black, tail - brown, red - stop, ground - white. This is like the regular 7 wire sytle light hook up. If this 4 wire tail harness is not correct I will run new 7 wire cable from the front firewall terminal strip following the wire diagram. Any ideas or tips?

Thanks, & happy new year!,

Deo

Hi

The lights for the rear of a dump truck only use 4 wires as the turn & stop lights work off of the same wire, it works sort of like a car, turn signal on cancells the brake light for that side. Check each wire 1 at a time with only 1 thing turned on( Left turn,right turn etc.) and it is pretty easy to figure out. As far as your question about the light on the dash next to the hi beam light it is for the parking brake, comes on when the parking brake is on.