Question about driving a dozer
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=135401
Printed Date: 30 Jul 2025 at 5:58am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Question about driving a dozer
Posted By: Ferdinand
Subject: Question about driving a dozer
Date Posted: 22 Feb 2017 at 9:23pm
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I'm sure I asked this question before but, nothing turn up in a Search of the Forum. Anyway, I've been watching videos of dozers in operation. When the driver has the dozer in gear and engages the clutch; the whole machine jumps. Sort of like dumping the clutch on a car. Except, the car starts spinning the tires whereas the dozer tracks grab the ground and the whole things jumps forward. The question: Is this hard on the transmission? Should the driver engage the clutch at a low idle setting and then bring the rpm's up after the dozer is moving? I know that some IH's have a deccel pedal for slowing the engine when reversing direction. Maybe not quite the same thing but, there is a youtube video of someone's German Tiger I tank starting from a standstill and suddenly jerks forward. Seems awful hard on the trans. Maybe dozers are tougher than I imagine. ------------- Because narrow is the gate, and narrow is the way, which leads unto life, and few there be that find it. Mathew 7:14 |
Replies:
Posted By: SteveM C/IL
Date Posted: 22 Feb 2017 at 9:50pm
| They move pretty slow so the sudden engagement isn't as bad as appears.If you ever ran a manual drive you'd find yourself jerking it too.Power shift is best.Just hit decelerator as flipping lever and release.There you find yourself using decelerator more softly as you get tired of getting jerked from one direction to the other.Cat P/S were designed to withstand wide open direction changes.The operator gives up before the tractor. |
Posted By: Ferdinand
Date Posted: 22 Feb 2017 at 10:22pm
o.k., thanks. I guess they tougher than I think. Here's a video of what I"m saying anyway. The jerk or jump occurs at about the 0:34 mark. Yes, it's a Red machine. [TUBE]gC6r1L1IMa4[/TUBE] ------------- Because narrow is the gate, and narrow is the way, which leads unto life, and few there be that find it. Mathew 7:14 |
Posted By: JC-WI
Date Posted: 22 Feb 2017 at 11:01pm
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Ferdinand, that really was no jump there, more like a little bounce... normal every day happening there..
------------- He who says there is no evil has already deceived himself The truth is the truth, sugar coated or not. Trawler II says, "Remember that." |
Posted By: Sugarmaker
Date Posted: 23 Feb 2017 at 2:00am
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If your not already there the guys on the Red power forum would like to see those red machines pushing dirt too! Regards, Chris ------------- D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet. |
Posted By: Coke-in-MN
Date Posted: 23 Feb 2017 at 11:15am
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One thing to remember is the jump is the engaging of the sprocket teeth with the bushing roller of the track that is stationary . It's not like a tire that has power applied to it and either spins breaking traction or throws a shock load onto full driveline . Yes it is possible to spin the tracks on a machine when it breaks the track friction to ground surface loading - this is weight of machine x track surface / HP torque applied. A good operator knows the load to move + resistance + speed needed / HP available .
To this he applies the power needed at proper time to get the job done . You do not attack a pile of dirt starting at the center - but pick at edge and work to fully load blade or bucket .Same digging a hole or dozing area - start light and work up to full loading - watch the guy work the depth of the blade to keep tractor moving . There is more to operating a machine than many think - it the case of the IH shown a hand clutch in engaged while other hand controls blade - once machine is moving the steering clutches, brakes and blade depth all are worked to keep power applied without stalling engine. In newer machines with power shift and pedal steer it's easier and faster , in fact many machines are now joystick pilot controlled operation. ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: LeonR2013
Date Posted: 24 Feb 2017 at 6:39am
| You don't want to feather the clutch too much or you will have a early clutch failure. |
Posted By: Ferdinand
Date Posted: 24 Feb 2017 at 1:05pm
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Thanks for the info guys. It wasn't so much as feathering the clutch as: do you engage the clutch at a low idle and then advance the throttle or just put the throttle at the high speed detent and go ahead and engage the clutch.
Good to know, if I ever get to own a dozer. Here is what I'm talking about with a German tank. I think this isn't normal. At about 2:34. See that much tonnage jump like that makes me cringe. [TUBE]ROnb5ouBjNc[/TUBE] ------------- Because narrow is the gate, and narrow is the way, which leads unto life, and few there be that find it. Mathew 7:14 |
JC(WI) wrote:Posted By: DiyDave
Date Posted: 24 Feb 2017 at 6:08pm
If oddball was drivin that tiger, he wouldn't have popped the clutch, on that 1-2 shift. Gotta remember to think positive thoughts... [TUBE]http://youtu.be/f5cL-h3Pj1o[/TUBE]
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Posted By: SteveM C/IL
Date Posted: 26 Feb 2017 at 12:24pm
| The 2 manual drives I operated,you left the throttle wide open and pulled the clutch in. |
Posted By: Coke-in-MN
Date Posted: 27 Feb 2017 at 8:49pm
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Most older machines did not have decelerators - so engine stays at constant RPM and clutch is used to change direction or gear ratio. You do NOT slip clutch but ease it into drive - in either direction - As one hand is operating lever for blade or bucket - other hand is operating master clutch which allows the other hands to use steering clutch levers as they need to be pulled before using feet on brake pedals . ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: NEVER green
Date Posted: 28 Feb 2017 at 9:26am
I agree, that dont look good, thats 52 tons of tank. ------------- 2-8050 1-7080 6080 D-19 modelE & A 7040 R50 |