rhartl1998ch600

My air does not work and I wanted to wire up a fan and mount it to the top of the dash.

Hi. Can someone tell me the chances of a 1993 Mack R model quad axle dump truck still being positive ground?

Is it a 6014 bulb for the headlight of a Mack R model with round headlights?

Hello. I just started driving a 1993 Mack R model valueliner dumptruck with the round headlights. I noticed this morning that I had a headlamp not working. The truck is parked for the weekend at the construction site 2 hours away. Can anyone tell me what part number the replacement lamp would be?

If it helps, it is a CH600 ELITE set up for over the road with lots of extras including dual exhaust and a eaton 10 speed.

Sorry I don't know right of hand and the truck is 10 miles away and I won't be out there for over a week.

I just started driving a 1998 ch600 with a mack 6 cylinder engine equipped with a two stage engine brake. I believe it is a actual Jacobs engine brake and not a Mack brake the way it behaves. The engine brake would sound like it was missing at higher rpms but would work properly at around 1700 and below. The problem however has gotten worse and it now sometimes doesnt work until below 1600 or even lower. Yesterday when I turned the brake on it did'nt come on at all. I was going down a pretty good size hill so I slowed down using the air brakes and dropped one gear and then was at 1800 rpms and the brake kicked in but was still missing. Almost every truck I have driven since 1979 has had a engine brake but when I told the owner about the problem he said, "dont worry about it, you dont know what you "f"ing talking about. Any help would be appreciated. Thanks