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Old 03-24-2018, 05:38 PM   #21
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Originally Posted by Brando View Post
...oh, and here are a couple pics of the bottom of the bus, the first pic taken from the driver's side and the second from the passenger's side. What are these cylinders?

Looks like oil filters. Yes. 2 of them.
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Starter. Very heavy.
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Old 03-24-2018, 05:46 PM   #22
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Year: 1991
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Chassis: T/C 2000 28 foot Handy Bus
Engine: Cummins 5.9 Mechanical
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8.) Air Pressure Will Not Rise To Normal
-Faulty air gauge (registering incorrectly).
-Excessive valve or fitting leakage.
-Governor out of adjustment.
-Slipping compressor drive belt.
-Faulty compressor.
-Broken supply line.
9.) Air Pressure Rise To Normal
Too Slowly
-Excessive valve or fitting leakage.
-Excessive reservoir volume.
-Clogged compressor air strainer.
-Engine speed too slow.
-Compressor discharge valve or inlet valves
leaking.
-Compressor drive belt slipping or faulty drive
coupling.
-Worn compressor.
-Excessive carbon in compressor cylinder head or
discharge line.
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Old 03-26-2018, 11:05 PM   #23
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Location: portland, or
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Year: 1984
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Quote:
Originally Posted by Rivetboy View Post
8.) Air Pressure Will Not Rise To Normal
-Faulty air gauge (registering incorrectly).
-Excessive valve or fitting leakage.
-Governor out of adjustment.
-Slipping compressor drive belt.
-Faulty compressor.
-Broken supply line.
9.) Air Pressure Rise To Normal
Too Slowly
-Excessive valve or fitting leakage.
-Excessive reservoir volume.
-Clogged compressor air strainer.
-Engine speed too slow.
-Compressor discharge valve or inlet valves
leaking.
-Compressor drive belt slipping or faulty drive
coupling.
-Worn compressor.
-Excessive carbon in compressor cylinder head or
discharge line.
this is incredibly helpful thank you.

I am going to take the governor off of the compressor tomorrow and run it to see if that is the problem. It looked like the belt slipped a little also (every 10-15 second you could see it slow and then quickly gain speed).
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Old 03-30-2018, 03:07 AM   #24
Mini-Skoolie
 
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Location: portland, or
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Year: 1984
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I was testing the governor today and i noticed that the belt that connects the compressor to the alternator might be a little loose. (the alternator stops spinning for a moment every 10-15 seconds or so).
I also noticed that the gasket between the governor and the compressor has deteriorated. I am going to replace both of these and then see if I have better luck with the pressure.
also, i bled the tanks and they were pretty dry.
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Old 03-30-2018, 09:56 PM   #25
Mini-Skoolie
 
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Join Date: Jul 2017
Location: portland, or
Posts: 14
Year: 1984
Coachwork: Bluebird
Quote:
Originally Posted by Rivetboy View Post
8.) Air Pressure Will Not Rise To Normal
-Faulty air gauge (registering incorrectly).
-Excessive valve or fitting leakage.
-Governor out of adjustment.
-Slipping compressor drive belt.
-Faulty compressor.
-Broken supply line.
9.) Air Pressure Rise To Normal
Too Slowly
-Excessive valve or fitting leakage.
-Excessive reservoir volume.
-Clogged compressor air strainer.
-Engine speed too slow.
-Compressor discharge valve or inlet valves
leaking.
-Compressor drive belt slipping or faulty drive
coupling.
-Worn compressor.
-Excessive carbon in compressor cylinder head or
discharge line.

It was the slipping compressor drive belt. I increased the tension on the alternator and now the pressure goes up quickly.

Thanks so much!
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Old 03-30-2018, 10:55 PM   #26
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Location: Houston, Texas
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I LOVE a cheap N' easy fix! Congrats!
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Old 03-31-2018, 09:20 AM   #27
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 12,677
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
yeah!!! super!! Love these kind of fixes too.. and you learned a lot about how air brakes work in the process!!
-Christopher
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Old 03-31-2018, 12:05 PM   #28
Bus Geek
 
Join Date: Sep 2017
Location: Owasso, OK
Posts: 2,627
Year: 1999
Coachwork: Thomas
Chassis: Saf-T-Liner MVP ER
Engine: Cummins 6CTA8.3 Mechanical MD3060
Rated Cap: 46 Coach Seats, 40 foot
Quote:
Originally Posted by Brando View Post
It was the slipping compressor drive belt. I increased the tension on the alternator and now the pressure goes up quickly.

Thanks so much!
Nice

If the belt has been slipping any length of time it will be compromised.

Change it when you can and keep the old one in the bus, as a spare.
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