Search found 382 matches

by DrLoch
Wed Sep 29, 2021 7:37 am
Forum: Late model JD crawler technical support
Topic: new to the 450c crawler need help died and won't crank?
Replies: 21
Views: 14199

Re: new to the 450c crawler need help died and won't crank?

Southern,

You should start your own thread so it is easier to track any answers and comments.
by DrLoch
Tue Jul 13, 2021 6:19 am
Forum: Late model JD crawler technical support
Topic: new to the 450c crawler need help died and won't crank?
Replies: 21
Views: 14199

Re: new to the 450c crawler need help died and won't crank?

Sounds like he doesn't have power at the dash/circuit breaker. You'll need a test light at the very least. Battery is good? You have power to the starter solenoid with the switch on? turn ignition switch on, hear a click? Check for power at the injection pump solenoid. If you don have power at the i...
by DrLoch
Mon May 10, 2021 7:21 am
Forum: Late model JD crawler technical support
Topic: 450c Hydraulic pump replacement
Replies: 3
Views: 2732

Re: 450c Hydraulic pump replacement

https://www.surpluscenter.com/Hydraulics/Hydraulic-Pumps/Gear-Pumps/?page_no=2&fq=ATR_Mount:2\+bolt\+SAE\+B&fq=ATR_Port_Location:Side&fq=ATR_Shaft:Splined Cheaper but you will have to adapt existing lines, just a thought. FYI to figure output in GPM take volume cu/in rev X RPM/231. so a 4.27 cu in p...
by DrLoch
Tue Mar 23, 2021 7:12 am
Forum: Late model JD crawler technical support
Topic: 450C track loader hose replacement question
Replies: 16
Views: 10476

Re: 450C track loader hose replacement question

When I did mine, like the others I had the boom of the ground and pulled the rear pins to get the rear hoses. I bought all kinds of wrenches, bent some of said wrenches and really improved my language skills.
by DrLoch
Sat Mar 13, 2021 6:35 am
Forum: Late model JD crawler technical support
Topic: 350 B Injector Pump Roosa
Replies: 5
Views: 3642

Re: 350 B Injector Pump Roosa

I agree with Jim, talk with the people that rebuilt it. Does the shop have a test stand to run the pump after a rebuild?
by DrLoch
Tue Jan 12, 2021 7:55 am
Forum: Late model JD crawler technical support
Topic: Seeking advice on replacing high pressure hydraulic line in a 450B
Replies: 13
Views: 8243

Re: Seeking advice on replacing high pressure hydraulic line in a 450B

[/quote]

Thanks Jim, I had read somewhere else to avoid 303 and use J20C and so I'm using Shell Rotella HD which was the best stuff I could find in a hurry.
[/quote]

I'm somewhat confused, which happens often nowadays, are you saying you used Rotella HD in the transmission?
by DrLoch
Wed Nov 18, 2020 7:54 am
Forum: Late model JD crawler technical support
Topic: H-flow pump puttin, total new lines havin- 1st time doin
Replies: 7
Views: 4967

Re: H-flow pump puttin, total new lines havin- 1st time doin

I'm sure the limiting factor is based on the size of the inlet line, 1-1/4". At those speeds the suction line velocity is already higher than what we generally consider best practices in the industrial world. Then you have to factor in the temperature, cold oil moves slower than warm oil, add in the...
by DrLoch
Thu Oct 29, 2020 7:13 am
Forum: Late model JD crawler technical support
Topic: search program stinks
Replies: 7
Views: 5081

Re: search program stinks

That reply certainly provides what you need to do.
by DrLoch
Thu Oct 08, 2020 2:39 pm
Forum: Late model JD crawler technical support
Topic: Basic loader control valve flow-direction question...
Replies: 6
Views: 4023

Re: Basic loader control valve flow-direction question...

More isn't always better in some cases which is what I believe Lavoy is implying. Hope you know, more flow requires more horsepower you don't get anything for free unless it's our government, which is another subject all together. You'll no doubt figure that out, you need to taylor the pump flow cur...
by DrLoch
Sat Sep 19, 2020 6:00 am
Forum: Late model JD crawler technical support
Topic: 450C HLR Pressure
Replies: 3
Views: 2762

Re: 450C HLR Pressure

Does the pressure drop when checked in all of the 3 ranges, Hi-Lo-Rev? If it does then it is something common to all. There are some line hard lines under the cover. Did you do a complete clutch adjust as per the manual? There are clutch packs inside the transmission the engage and disengage the var...
by DrLoch
Fri Sep 18, 2020 7:18 am
Forum: Late model JD crawler technical support
Topic: 450C HLR Pressure
Replies: 3
Views: 2762

Re: 450C HLR Pressure

Pressure should be the same in 3 ranges. A good pressure is 180 PSI. If it
by DrLoch
Wed Sep 16, 2020 6:55 am
Forum: Late model JD crawler technical support
Topic: 450B shifting speed
Replies: 11
Views: 6593

Re: 450B shifting speed

As others have suggested, you need to go through all the preliminary checks and adjustments prior to adjusting the needle valve that controls shifting speed. Optimum pressure for the HLR is about 180 PSI.
by DrLoch
Tue Aug 25, 2020 6:30 am
Forum: Late model JD crawler technical support
Topic: 550B tracks stop...after some run time
Replies: 6
Views: 4054

Re: 550B tracks stop...after some run time

Given you just had transmission service, did it do this before the service work? If not, next question would be what fluid did they use? Appears to be more to the issue.
by DrLoch
Fri Jul 31, 2020 7:50 am
Forum: Late model JD crawler technical support
Topic: 450B problem
Replies: 40
Views: 24652

Re: 450B problem

Pump will only go in/on one of two ways, correct or 180 degrees off since it's the tang on the end of the driveshaft that goes into the distributor rotor assembly. Lining up the pin in the flywheel and the mark in the window is to insure you aren't 180 degrees off on your injector timing. If you loo...