Search found 363 matches

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: 829

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: 965

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: 894

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: 687

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: 565

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: 565

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: 1374

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: 1142

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: 8131

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...
by DrLoch
Tue Jul 21, 2020 6:59 am
Forum: Late model JD crawler technical support
Topic: Dumped my hydraulic fluid, am I damaging my pump?
Replies: 16
Views: 4059

Re: Dumped my hydraulic fluid, am I damaging my pump?

If you are looking for a line that is Flexible, take a look at this https://ph.parker.com/us/en/multipurpos ... -z-form-mp

E-Z Form MP Oil Resistant Flexible Suction Hose, Multipurpose, Series 7219

Have had good results with it in tight areas.
by DrLoch
Tue Jun 30, 2020 6:52 am
Forum: Late model JD crawler technical support
Topic: Dumped my hydraulic fluid, am I damaging my pump?
Replies: 16
Views: 4059

Re: Dumped my hydraulic fluid, am I damaging my pump?

Jim has provided the best answer. If it's a loader, my guess is that it's the pressure line since the only lines running tot the front through the belly pan are the pressure and suction lines for the pump. If you wrap the line as suggested, don't move the bucket handle. You may be able to get it out...
by DrLoch
Tue May 26, 2020 6:46 am
Forum: Late model JD crawler technical support
Topic: JD 350B Steering Issue
Replies: 11
Views: 2365

Re: JD 350B Steering Issue

That information would be covered in manual.
by DrLoch
Fri May 15, 2020 7:32 am
Forum: Late model JD crawler technical support
Topic: 450C Crawler w/Backhoe blowing hydraulics
Replies: 9
Views: 2379

Re: 450C Crawler w/Backhoe blowing hydraulics

Can you could, please post a crude hydraulic schematic of how you have this plumed before you seriously injure yourself or someone else. Injection of hydraulic oil into bloodstream is a very serious thing that could kill you or someone else. I would also like to suggest you stop using this machine i...
by DrLoch
Sun May 10, 2020 6:51 am
Forum: Late model JD crawler technical support
Topic: Possible water pump issue, JD450
Replies: 9
Views: 2085

Re: Possible water pump issue, JD450

Agree with Jim having waited myself. Didn't trash the radiator but did trash the fan blade. Fix it now. Little suggestion if you do remove the nose. Pull the pump coupling back and put extra fan belts in before reconnecting pump. I zip tied them out of the way until needed.
by DrLoch
Wed Apr 22, 2020 7:07 am
Forum: Late model JD crawler technical support
Topic: 450c 6-way fittings?
Replies: 46
Views: 8973

Re: 450c 6-way fittings?

Flow = speed
Force/pressure = restriction of flow,
Reduced pressure = reduced force
If you want to reduce the flow the correct method is to replace the pump with one that is smaller, i.e. less cu/in pre rev equals less flow for a given RPM with a gear pump.