Construction and Road Equipment

Construction and Road Equipment repair questions? Ask a mechanic ASAP

Ask an Expert,
Get an Answer ASAP!

Construction and Road Equipment

Caterpillar 950 wheel loader 1970 model serial # 81J822 Will

Customer Question
Caterpillar 950 wheel loader 1970...
Caterpillar 950 wheel loader 1970 model serial # 81J822
Will shift to neutral, first forward and first reverse but will not shift into 2nd, 3rd or 4th in forward or reverse. This happened at the same time the smaller of the two air lines coming from the air compressor rusted through. I fixed the air line but the shift handle will not rotate out of 1st gear
Submitted: 1 year ago.Category: Construction and Road Equipment
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Answered in 2 hours by:
10/10/2016
Mechanic: catmastertech, Technician replied 1 year ago
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2,391
Experience: Field service technician for CAT 19 years.
Verified

Hello,

Air compressor lines will not effect the transmission speeds. The only related part is a line from the left pedal to the transmission control valve to "de-clutch" the drivetrain when pressing the left brake pedal. This neutralizes the transmission but will not effect speeds or direction.

I would check the linkage for wear. Disconnect the shifter linkages and manually shift the transmission levers to see if the transmission will engage each gear. If you cannot move the levers on the transmission, the problem is internally and the transmission control valve may have a problem.

Also check the shifter for binding once you disconnect the transmission linkage.

You can usually access the linkage by removing the floor plate.

If you need further help, please let me know.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
Perhaps it's that I have no clue other than a service manual which doesn't talk about shifting.I was able to twist the shift lever and shift gears when it was delivered. I am unaware of the left peddles affect on the transmission so maybe I just need basic instructions on how to use it as it has been 40 years since I drove one of these.
Mechanic: catmastertech, Technician replied 1 year ago

I am sure you already know the control pattern. The thing I see happen the most is the linkage get worn and jammed into some other object or the controls seize. Disconnecting the linkage is the best way to determine where the problem is located.

Disconnecting it at the transmission will show if the lever and linkage is the issue or the transmission control linkage and valves.

The left pedal is like the "neutralizer" pedal used today. On these older machines it required you to press the left pedal hard enough to force open the "de-clutch" valve and then the transmission is in neutral. This allows the engine power to be available for the hydraulic system and help the bucket break out of the pile quicker without you needed to move the lever. When youu left off the pedal, the transmission will re-engage the selected gear/direction.

If it appears damaged, see the attached files to correctly adjust the controls.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
The control pattern? Twisting the shift lever to 1 through 4 is all I know. I'll try depressing the left pedal. If you can think of how someone with zero knowledge could fail in shifting or how I could do something to keep it from shifting please let me know. Seems like it shifted to nicely to all of a sudden that the shift handle won't twist at all.
Mechanic: catmastertech, Technician replied 1 year ago

Yes, that is what I meant. You already know how to engage forward and reverse and twist for each gear. Nothing else to explain on that.

You have not done anything wrong. Your machine has a problem. It is most likely in the shifter is damaged or the linkage is damaged. It could be in the transmission but, I have not seen that happen much.

That is why you must disconnect the linkage to figure out where to start. If you cannot find something obvious, at least you can tell where to focus for further repair.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
I have not been able to address this issue yet so it's not yet time to rate your advice. I did just change out injectors and managed to strip out one of the fuel line nuts and I assume the part holding the injector that line / nut connects to. I'll have to try and find out where to buy those parts and then get back to the shifter issue. BTW the diagrams you provided show a second handle, mine only has one handle??
Mechanic: catmastertech, Technician replied 1 year ago

The instructions are for two different serial numbers. The service manual only states "early models" or "later models". I sent both to be certain you can see which will match your model.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
I see now that diagram B14 shows early 950 and appears to have only one handle like mine.OK so the diagram doesn't give me enough info to imagine the relationship between the cap (#2) and (#5) rack and what the rack does. I did find the cap loose so I tightened it thinking it was just a tensioning nut, could operating the speed and direction control handle with the cap loose, then tightening the cap later have caused my issue of the speed control handle not being able to rotate out of first gear? If yes then how do I proceed?Thanks Arnold
Mechanic: catmastertech, Technician replied 1 year ago
The cap is just a cover. The adjustment is to allow the handle to rotate fully and engage all the speeds. The speed numbers on the handle are only for reference. It is an adjustable ring.
If handle rotates, use the adjustments to check your linkage.
Have you disconnected the linkage to find where yours is binding yet?
Have you tried manually moving the shift linkage on the transmission to see if it engages each gear yet?
Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 year ago
The instructions say to remove the cap as if that did something. If it's just a cover then why remove it as they don't say to do anything under it right?I ran out of time yesterday, it's about 1.5 hours away. I had changed injectors and was preparing to look at the linkage and I ran it out of fuel. Then stripped out an injector line end and whatever the part is that the injector screws onto while bleeding out the lines. Any advice where I can find an injector line and the other part?After reading the instructions and noticed taking off the cap was needed I thought maybe that's were the problem started.
Mechanic: catmastertech, Technician replied 1 year ago

If you read through step 4 of the B-14 page, it states to turn the handle until the rack is 1.5 to 3.0 mm above the end of the housing then make adjustments to rod (6). The transmission linkage should be in fourth speed and if the rod is adjusted correctly, the linkage will fit properly.

Some customers add a small block on top the the rack (5) to block out fourth speed to control wild operators. If you remove the cap and turn it to fourth speed, the block will fall out. (if yours had one)

Your CAT dealer has a used parts section. That is were I source may parts for old iron when I am making repairs. Many of the engine parts are still available as new and prices are not that different from current machines.

I would never buy used injectors, only REMAN injectors from CAT so you can at least have a warranty.

Ask Your Own Construction and Road Equipment Question
Ask catmastertech Your Own Question
catmastertech
catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2,391
2,391 Satisfied Customers
Experience: Field service technician for CAT 19 years.

catmastertech is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Curtis B.

Curtis B.

Technician

1,243 satisfied customers

Technican turned service manager with multiple lines of equipment and rental units.

Wayne

Wayne

Journeyman

600 satisfied customers

worked on many road graders, Bull dozers , skid steers, Rollers

Cat Man

Cat Man

Cat Engine Expert

490 satisfied customers

I am ASE Master Certified.

dieseldan55

dieseldan55

Mechanic

270 satisfied customers

Road Mechanic for Volvo Construction Equipment.

Steve

Steve

Mechanic

42 satisfied customers

Heavy Equipment Mechanic for 25 years

Chris (aka- Moose)

Chris (aka- Moose)

Technician

39 satisfied customers

16 years of experience

JBFixxer

JBFixxer

Mechanic

20 satisfied customers

16+ years experience, hydraulics,hydrostatics, engines, fuel injection systems. And everything in between.

< Previous | Next >

Related Construction and Road Equipment Questions
We have a 301 dynapac roller. It cavitates and won't move
We have a 301 dynapac roller. It cavitates and won't move when trying to go in either direction. We changed hydraulic filters. What next??… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
Rebuilding a Nissan forklift with. H20 engine Nissan it has
H20 engine Nissan it has shims between crank and crank gear what is the deal with the shims … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
What are the cab dimensions for. I need cab dimensions for
I need cab dimensions for the WL 36 the WL 52 and the WL 60 Wacker Neuson Articulating Loader. I am looking at purchasing a new machine. I sat in the WL36 and ideal size, seating a bit cramped. Sat in WL60 plenty of space, little to pricey. No WL52 to sit in and try. Hope seating/cab space is somewhere in between. … read more
Jeremy
Jeremy
Technician
Vocational, Technical or Trade Scho
104 satisfied customers
2001 303.5 cat joy stick control change were is it located.
2001 303.5 cat joy stick control change were is it located … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I have a cat mini excavator that is beginning to make some
I have a cat mini excavator that is beginning to make some noise in the center pivot area, and it seems like it's straining. I would like to know what maintenance I should do and how it is done on tha… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I'm trying to find out how to change the key start switch on
I'm trying to find out how to change the key start switch on a Caterpillar 277B … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
Company bought a Linkbelt 298 HSL. I know how to build
Company bought a Linkbelt 298 HSL. I know how to build cranes, but not this one. I need to see an operators manual. I'm sure we will get one, maybe, with the crane, but I will not guarantee that. … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I have a snorkel uno41d 4x4 got from auction. The foward and
I have a snorkel uno41d 4x4 got from auction. The foward and reverse drive goes goes way slower than it should even at high throttle and it surges a little when going. All other hydraulic items work f… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 satisfied customers
I have a d6m cat dozer.I need a wiring diagram for the motor
I have a d6m cat dozer.I need a wiring diagram for the motor we replaced the motor and the wiring was messed up when my helper took it out.He is know longer working with me and we are trying to get it… read more
catmastertech
catmastertech
Technician
2,391 satisfied customers
What does code u 003516-01 mean and how to correct also
what does code u 003516-01 mean and how to correct also codeu005246-24 unit level on fluid fine … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I have 1997 D3 with a 6 way blade, i blew a hydraulic hose
Hi,, i have 1997 D3 with a 6 way blade, i blew a hydraulic hose now when i use the blade it swings when there's pressure against it,,any suggestions?… read more
catmastertech
catmastertech
Technician
2,391 satisfied customers
Have a johndeere 27 zts mini excavator with iszuzu engine.
have a johndeere 27 zts mini excavator with iszuzu engine. after sitting over night will not start with out stsrting fluid.seems to be loosing fuel to injector lines after sitting several hours no sig… read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I have a 2007 komatsu pc35mr...at idle there is no hydraulic
I have a 2007 komatsu pc35mr...at idle there is no hydraulic operations at all,,at 1/2 throttle it starts to move and at full throttle it operates as a normal machine operates at 1/2 throttle … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
Fault code tigercat 830C harvester 21716. Tigercat Feller
Tigercat Feller Buncher/Cliff Serial # 83072180 Year: 2015 … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
We have a Kubato RX501 excavator and need to fine a
Hi we have a Kubato RX501 excavator and need to fine a replacement motor can you advise if there are engines that can be used as a replacemnent … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I NEED A OPERATORS MANUAL FOR MY DEER GT262 LT ,--PART
I NEED A OPERATORS MANUAL FOR MY JOHN DEER GT262 LT ,--PART NUMBER OMM134307 … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
600 satisfied customers
CAT 272 SKID STEER RIGHT JOY STICK WOUNT WORK FLASHING
CAT 272 SKID STEER RIGHT JOY STICK WOUNT WORK FLASHING DIMOND ON PANEL … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
0 satisfied customers
I have a Bobcat 743B. Battery is charged, but nothing hapens
I have a Bobcat 743B. Battery is charged, but nothing hapens when I turn the key. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,243 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x