A "BIG AL" Question
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=185595
Printed Date: 18 Aug 2025 at 12:04pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: A "BIG AL" Question
Posted By: Unit3
Subject: A "BIG AL" Question
Date Posted: 06 Jan 2022 at 11:44pm
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With a 844 in a semi, how was the air pump run? Was it a gear driven or a belted? ------------- 2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C |
Replies:
Posted By: DiyDave
Date Posted: 07 Jan 2022 at 4:34am
Looks like belt driven compressor, off same belt as WP. Scroll down in this old thread, for photos... https://www.allischalmers.com/forum/weight-of-a-big-al-engine_topic76226.html" rel="nofollow - https://www.allischalmers.com/forum/weight-of-a-big-al-engine_topic76226.html ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: ACjack
Date Posted: 07 Jan 2022 at 9:45am
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It was belt driven from the fan blade pulley and not from the water pump belt. We were building engines for both Frightliner and Kenworth. There were minor differences between them and on some of the engines the air compressor was mounted on the LH side instead of the RH side.
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Posted By: Unit3
Date Posted: 07 Jan 2022 at 11:27am
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I saw just yesterday one of the gen sets with the Mt. Everest 25000 engine. Makes you feel sorry for the 8550 or 4w305 to hold one of the engine blocks up. ------------- 2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C |
Posted By: DougG
Date Posted: 07 Jan 2022 at 11:30am
| No kidding there = those things have to weigh close to 5000 lbs ,, |
Posted By: 8070nc
Date Posted: 07 Jan 2022 at 12:36pm
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I have one on a AC DES 300 genset. It has a bosch p pump mounted directly on the timing case up high. Its the only one I have seen that didnt have the injection pump low with a drive shaft ------------- 1984 80780 1957 D14 DES 300 with 25000 engine 616 tractor |
Posted By: steve(ill)
Date Posted: 07 Jan 2022 at 12:37pm
------------- Like them all, but love the "B"s. |
Posted By: DiyDave
Date Posted: 07 Jan 2022 at 5:53pm
I was going from what I saw in Steve's picture, from the old post I linked to. I stand corrected!  ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
ACjack wrote: