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
This answer was rated:

I have a cat 322bl sn 8nr00291. It will swing left but wont…

Hello, I have a...

Hello, I have a cat 322bl sn 8nr00291. It will swing left but wont brake but wont swing right but will brake, I've installed new solenoids front and back on the swing motor and swapped the cross over teleif valves with no change in symptoms. However the auto idle will not work now. There is a green light on the ecu. Regards Adrian

Mechanic's Assistant: What is the complete model and serial number of your machine?

322bl sn 8nr00291

Mechanic's Assistant: Anything else you want the equipment mechanic to know before I connect you?

The machine has a hydraulic thumb fitted and the plunger seals failed around the same time the swing problem occurred. Coincidence or some of the remnants have interfered with a solenoid or pressure switch

Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. The Heavy Equipment Mechanic I'm going to connect you with knows all the tricks and shortcuts.

Thankyou

Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Answered in 23 minutes by:
1/11/2018
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 6,152
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified

Hi ,My name is***** will be glad to help. We can follow up as needed on here, Give me some time to review your information and post my responses. Im not an employee of the site but I help on here as time allows in between jobs. Response time will vary depending on my work load , etc.

Ask Your Own Construction and Road Equipment Question

What do you have for fault codes logged in the monitor or if you can assess with Cat ET?

Ask Your Own Construction and Road Equipment Question

If swapping the crossover reliefs did not move the problem, tee in and check the pressure from the control valve to the swing motor in both directions as it sounds like maybe a control valve problem or a relief valve. check the reliefs and the control valve spool for debris, damage, etc.

Ask Your Own Construction and Road Equipment Question

Also check if there is pilot pressure from a possible stuck pilot control plunger sticking in the joystick control causing constant pilot pressure shifting the swing spool in the main control valve.

We can follow up as needed.

Please take a moment to rate as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 month ago
Ok will follow-up and let you know

Pleasure to help.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 month ago
Hi Dan, seems to be plenty of pilot pressure to the control bank. I'm in the field at the moment so I don't have guages with me but cracked supply lines to swing motor and port A has a lot less pressure than port B. Pulled the valve out of the control bank and it seemed fine. I'll go through the fault codes now. Adrian

If there is enough slack in the hoses try crossing them to see if the problem changes directions for further confirmation. Keep me posted

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 month ago
Ok will do, what pressure is acceptable going into the swing motor and also what should the pilot pressure be? Just going to put some guages on it now. Thanks Adrian

Hi Adrian. Pilot pressure will be somewhere around 550-600 PSI range. I do not have the main pressure and circuit specs handy at the moment but most important, you want to see if there is a difference between left and right swing with it deadheaded (bucket in the ground or lines capped after the gauge, etc ) You might see 2500 PSI or better but expect to see close to the same on right and left.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 1 month ago
Hi Dan, 3100 on one hose 0 on the other going into swing motor. My guage only went to 360 on the pilot on top of the control bank and 0 on the bottom pilot line, I am now pulling joystick apart and checking that
Customer reply replied 1 month ago
Sorry Dan, I had the guage on the wrong pilot line!! I'm getting 400psi to both pilot lines
Customer reply replied 1 month ago
Hi Dan is there a possibility it could be a pressure switch failing hence the auto idle not working? I've replaced the swing implement switch on right side of control bank (I had a spare one) to no avail. There is another pressure switch on the left side pn(###) ###-#### Just thinking out loud. Thanks Adrian

There is 0 even when trying to swing the other way? If so, check the control valve spool and also the pilot control pressure... Try swapping pilot lines from a good function with the one reading 0 and see if it will control that function and allow swing for test purposes.

Ask Your Own Construction and Road Equipment Question

Hi, Did you get this resolved? I see this is still open. Please take a moment to rate as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated. It's been a pleasure working with you on this.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 19 days ago
Hi Dan, still going, I haven't had a chance to get back to it. The hydraulic thumb cylinder was pretty much destroyed internally and there were alot of seal remnants in the tank filter. My next step was to swap pilot lines from another function, the closest is the LH travel spool. I'm tending to think there is a problem with one of the 4 relief valves on the swing motor . I will get back to it asap and get back to you. Thanks Adrian

thanks for the update Adrian. Sounds like some trash might have gotten into the control valve and reliefs in other parts of the system. Recommend pulling them and inspecting the valves and cartridges for trash or damaged o rings.

Ask Your Own Construction and Road Equipment Question
Customer reply replied 18 days ago
Hi Dan, I changed the pilot lines from the lh travel spool still no success, the swing control operates the track both directions normally and the foot pedal operates the swing control but with the same problem. I've removed the 4 relief valves from the swing motor and there is no visible damage or foreign matter. Could it be one of the solenoids on the swing motor??

Thanks for the update. Check in the solenoid valves for debris and verify power to the solenoids as well. the swing brake holds once stopped with spring force on the friction disks top of the swing motor. The crossover reliefs are what create a hydraulic braking force to slow and stop swing.

Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 6,152
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified
Dan and 87 other Construction and Road Equipment Specialists are ready to help you
Ask your own question now
Customer reply replied 14 days ago
Hi Dan, I ended up sourcing a used swing motor from a donor machine, swapped it out and runs fine. Must be some debris fouling the friction discs inside the motor as you suggested. I will now get the old one stripped down and get it rebuilt to have as a backup. Thanks for your help. Regards Adrian

Thanks for the update and glad you got it resolved.

Ask Your Own Construction and Road Equipment Question
Ask Dan Your Own Question
Dan
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 6,152
6,152 Satisfied Customers
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.

Dan 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

1,272 satisfied customers

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

Wayne

Wayne

Journeyman

615 satisfied customers

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

Cat Man

Cat Man

Cat Engine Expert

495 satisfied customers

I am ASE Master Certified.

dieseldan55

dieseldan55

Mechanic

270 satisfied customers

Road Mechanic for Volvo Construction Equipment.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

42 satisfied customers

16 years of experience

Steve

Steve

Mechanic

42 satisfied customers

Heavy Equipment Mechanic for 25 years

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
I have a oil leak where trans bolts to engine.oil is coming
I have a oil leak where trans bolts to engine.oil is coming out of hole that has no bolt or treads it is a 450 series3 case … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
D3B catapillar 1985 model When you move the bulldozer
D3B catapillar 1985 model When you move the bulldozer forward or reverse, the left track acts like the brake is locked. Even though the steering clutch and brake is not touched. Have released all tens… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I just rebuilt transmission of L150E Once I start the
Hi I just rebuilt transmission of L150E Once I start the machine I test the pressures of the tranny The confusing thing is I got only forward clutch at the right spec pressure which is 196psi The rest… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
With cotton lake farms. I have a samsung 210 lc-3. I had to
Hey dieseldan, this is Derek Ralph with cotton lake farms. I have a samsung 210 lc-3. I had to replace a roller on undercarriage so of course I let tension off of tracks. Before I realized it, my hand… read more
Dan
Dan
Technician
6,152 satisfied customers
How to unlock tracks on new holland dc85 dozer. Will not
how to unlock tracks on new holland dc85 dozer JA: Sometimes things that you think will be really complicated end up being easy to fix. The Construction Equipment Mechanic I'm going to connect you wit… read more
Dan
Dan
Technician
6,152 satisfied customers
Ia have a td12c dresser that wont move I put a new steering
ia have a td12c dresser that wont move I put a new steering cluch pump but it didn't heip it ant got but 1800 hrs on it what could it be … read more
Dan
Dan
Technician
6,152 satisfied customers
I have a bobcat s650 Seems like it's not getting gas. Fuel
I have a bobcat s650 Seems like it's not getting gas. Fuel to filter is good. But not to injector. It was running great. Shut it down to get out of machine for 5 min then went to start up. Would not s… read more
Dan
Dan
Technician
6,152 satisfied customers
Catmastertech,Can you provide any kind of schematic or
Hi Catmastertech,Can you provide any kind of schematic or writen procedure along with the following specs? As i understand K is finished bore for 9P-5708 L is finished bore for 6T3793 What is CM ?We r… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I need a Deere specialist, 1973 300b backhoe, enough
I need a Deere specialist JA: What is the complete model and serial number of your machine? Customer: 1973 300b backhoe JA: Are you fixing this yourself? What have you tried so far? Customer: enough q… read more
Dan
Dan
Technician
6,152 satisfied customers
I have a Volvo ec240b lc and it will rollover but not fire
I have a Volvo ec240b lc and it will rollover but not fire relplaced speed sensor and batteries those were first issues bled air out of fuel line, no just get ERNO on the screen … read more
Dan
Dan
Technician
6,152 satisfied customers
Komatsu d66s-1 rear engine track loader. all functions work
komatsu d66s-1 rear engine track loader. all functions work except machine will not move. I think its an electrical issue. serial number 1219 1998 D66S… read more
Dan
Dan
Technician
6,152 satisfied customers
I have a TH560B that the assesory control to the attachment
I have a TH560B that the assesory control to the attachment point at the end of the boom will not operate (ie. the left or right tilt ).… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
I have a cat 416 backhoe, I charged both batteries, cleaned
I have a cat 416 backhoe, I charged both batteries, cleaned the terminals then tried to crank it over which it did, but it would not start due to cold temps. retried 30 seconds later, nothing not even… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
Have a 2008 cat 420e backhoe that the front wheel drive is
have a 2008 cat 420e backhoe that the front wheel drive is weak. replaced 4wd switch and have 12volt running to transfer case but front axle is weak. when elevated the axle turns but stops when set do… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I have problems with the transmission on my jd550 dozer
i have problems with the transmission on my jd550 dozer works good for about an hour or two then will quit moving i shut it of and let it sit for about 5 min then works good for awhile then does the s… read more
Dan
Dan
Technician
6,152 satisfied customers
I have 4240 no iced bucket drifting to the dump position on
I have 4240 no iced bucket drifting to the dump position on its own sounds like something leaking , it has finally went to the dump position it will not come to level needing help manor. … read more
Dan
Dan
Technician
6,152 satisfied customers
My dozer Td25G serial # is 2215 KT19-C engine I have a head
My dozer Td25G serial # is 2215 KT19-C engine I have a head gasket leaking how much of a job is this to fix and what year is this dozer … read more
Dan
Dan
Technician
6,152 satisfied customers
My Cat th360b has stopped. All joystick and frame tilt and
My Cat th360b has stopped. All joystick and frame tilt and stabiliser legs don't work. Power to the switch in the cab … read more
Dan
Dan
Technician
6,152 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