Construction and Road Equipment

Construction and road equipment repair questions? Ask a mechanic ASAP

Ask an Expert,
Get an Answer ASAP!

I have a Volvo L50B SN: XL50BP9413X that has low torque to…

Customer Question
I have a Volvo L50B...
I have a Volvo L50B SN: XL50BP9413X that has low torque to the wheels, and moves slowly when going up hills. The hydrostatic motor, pump, hydraulic pump, and gear pump have been gone through by a hydrostatic shop. The forward/reverse solenoids on the hydrostatic pump are new also. The manual calls for 6177 psi at the MA and MB ports on the hydrostatic pump, but I only have 5800 and 6525 psi at the two ports. Is there any additional adjustments that could be made, or any common problems of this nature? Would You recommend checking anything in specific or changing any specific parts?
Submitted: 2 years ago.Category: Construction and Road Equipment
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Customer reply replied 2 years ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer reply replied 2 years ago
I messed up the previous description. The pressures are 5800 and 5626, with 6177 being the pressure it is supposed to be at.
Answered in 58 minutes by:
2/24/2016
Mechanic: Bradley Martin,
 replied 2 years ago
Bradley Martin
Category: Construction and Road Equipment
Satisfied Customers: 178
Experience: Field Technician at Thompson Tractor Company
Verified

http://professional.justanswer.com/chat/index/06a16a3803394251ab433ee376c50c73

this article from a past customer with the issue you are having should help if it does not let me know

Ask Your Own Construction and Road Equipment Question
Customer reply replied 2 years ago
The URL you provided does not work, but I think I know what discussion you are talking about. I have already looked at the discussion regarding the L50B in which Dan was the answer expert. My question was regarding the hydrostatic side of the drive system, and what I might do with low pressure problems. I know that Dan said to look at the gearbox oil levels, and check pressures there. I did so a long time ago, and yes I will do so again. Dan also mentioned that the high low solenoid on the gearbox could be bleeding pressure off the hydrostatic system, which I don't understand because the systems are not linked. I guess he may have been talking about the forward reverse solenoids on the hydrostatic pump. I have issues with pressures below the specified amount on the hydrostatic pump, and I checked the clutch pressures in the gearbox. Dan mentioned relief valves that could be bleeding pressure in the pump, but I wondered what your experience with the machines was. I was wondering if you had additional thoughts on what may be causing my pressure loss.
Mechanic: Bradley Martin,
 replied 2 years ago

does this model have joysticks or levers?

Ask Your Own Construction and Road Equipment Question
Mechanic: Bradley Martin,
 replied 2 years ago

also does this model have a high speed switch? seems to me it may be stuck in high speed

Ask Your Own Construction and Road Equipment Question
Customer reply replied 2 years ago
The machine has separate levers for the tilt and lift for the loader. The controls for the two speed transmission are on the column by the steering wheel. That control is a handle for forward and reverse, and it is spun to select low or high speed. The loader does have a high low solenoid on the gearbox, but it shifts out of low and into high when driving it. You can feel the shift. It is possible that it may be stuck in high speed. Do you know a way of checking it? Also, do you know if the low hydrostatic pressures could cause the problem? Thanks
Mechanic: Bradley Martin,
 replied 2 years ago

does this model have a two speed solenoid near the hydrostat if it does should be able to pull the coil off and check the valve to make sure it is moving properly and have you tries adjusting the pressure relief valve to raise the pump pressure up

Ask Your Own Construction and Road Equipment Question
Customer reply replied 2 years ago
It does not have a high low solenoid on the hydrostatic system, but does have one on the gearbox. The gearbox solenoid is operating as we could feel it moving. I adjusted the pressure cut off on the hydrostatic pump, but I was not able to attain the correct pressure. Do you have experience with these machines? If not, is there an associate of yours that would?
Mechanic: Bradley Martin,
 replied 2 years ago

I will opt as I could not find my manual on this machine hope you are able to fix your issue sorry I could not help.

Ask Your Own Construction and Road Equipment Question
Mechanic: Dan, Technician replied 2 years ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 6,710
Experience: 17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
Verified

Hi Bryce, My name is***** will be glad to help. I worked at a Volvo Dealer in the past. First, the Hydraulic shop is responsible for calibrating the pump and drive motors so they should at no charge to you come out and stand behind their work and set up the pumps and if spec can not be obtained they need to pull them back off and see what they missed when they had them apart. Hopefully it is just an adjustment. Be sure there is no metal in the filter from the prior failure as i am assuming you flushed out the entire system? If not there is a potential that contamination in the system caused a problem with the rebuilt components and the shop will try to argue covering warranty. Let me know

Ask Your Own Construction and Road Equipment Question
Customer reply replied 2 years ago
The shop rebuilt the major components of the pump, but they did not replace all parts. The shop did not reman the parts, they rebuilt them. I pulled the components out initially, and I would have to pull them again if I wanted the shop to look at the pump. No we did not flush the system, only the hoses between the pump and motor. The shop found no contamination or excessive wear in any of the components anyway, so there was nothing to flush out of the system. My question is if you have any experience with common components that would cause pressure loss on this pump or system. Have you heard of the relief or pressure retention valves failing, or do you know of a way to test them? Does the control unit operated by the solenoids bleed pressure by if worn? Or maybe I am looking at the wrong part altogether, and I should check something else? Please let me know.
Thanks
Mechanic: Dan, Technician replied 2 years ago

Thanks for the info. What are the details of the original problem, chain of events, findings and symptoms that lead up to the disassembly and repair of all these components? Also, You mentioned you had seen the link to the old historical question. There are detailed proce3dures and specs to set the static pressures and for the adjustments. Which ones have you done or attempted so far?

Ask Your Own Construction and Road Equipment Question
Mechanic: Dan, Technician replied 2 years ago

Meaning all the adjustments.... Which ones have been adjusted so far?

Ask Your Own Construction and Road Equipment Question
Mechanic: Dan, Technician replied 2 years ago

Do you have the manual with this information or do you need it to be able to test and make these adjustments?

Ask Your Own Construction and Road Equipment Question
Mechanic: Dan, Technician replied 2 years ago

Hi, Did you get this resolved?

Ask Your Own Construction and Road Equipment Question
Was this answer helpful?
Ask Dan Your Own Question
Dan
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 6,710
6,710 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
2006 motorhome onfreightliner chassis with cat350hp C7 (i
2006 motorhome onfreightliner chassis with cat350hp C7 (i think) starts fine,runs good started feeling sluggish/low power very slow to get to shift point (allison 6 speed auto) will still do 65 when u… read more
timdieseltech
timdieseltech
diesel tech
Vocational, Technical or Trade School
57 satisfied customers
I have a cat 247 b3 skid loader. After I shut down the
I have a cat 247 b3 skid loader. After I shut down the machine after use it leaks hydraulic oil for a period of time. It does not leak when machine is in use. It drips from belly pan … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
I have an old deere 350 crawler without a reverser that
I have an old john deere 350 b crawler without a reverser that jumps out of reverse. How can I fix this? … read more
Dan
Dan
Technician
6,710 satisfied customers
I have a 963-C Caterpillar with 22" tracks. We are replacing
I have a 963-C Caterpillar with 22" tracks. We are replacing the undercarriage and are ready to fasten tracks together. How do I replace the seals in the track adjusters? My serial number is ***** … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
Furukawa loader fl120I pivot pin for centre of bucket west
furukawa loader fl120I pivot pin for centre of bucket west aust … read more
Dan
Dan
Technician
6,710 satisfied customers
We own a ec290 volvoexcavator and a ec14b volvo excavator
we own a ec290 b volvoexcavator and a ec14b volvo excavator both machines are not starting correctly we have noticed that on the digital display rpm mode is on when the engines wont start … read more
Dan
Dan
Technician
6,710 satisfied customers
In a 955H hydraulic bucket lift I added cat engine oil
In a 955H hydraulic bucket lift I added cat engine oil 15w-40 when we changed the seals on one of the cylinders. When I went back for more hydraulic fluid they gave me HYDO Advanced 10. Also what is r… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
Can you tell me what the allowable range of vacuum is for
Hello. Can you tell me what the allowable range of vacuum is for the air intake filter change sensor of a 5115R? … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
I have a day woo 601 the bucket picks up when I first
I have a day woo 601 the bucket picks up when I first started and it loses pick up tire when I have a load in the bucket what would that be … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
I heave a 580super e after hard use loading or just driving
I heave a 580super e after hard use loading or just driving the machine developers a hop,or tries to stop at a slow speed almost an ideal in gear, lately I hear noises coming from the right rear , my … read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
I have a CAT 277C that I am replacing the engine on. The new
I have a CAT 277C that I am replacing the engine on.The new engine is missing the engine speed sensor hole.The engine is totally mechanical.Does the engine speed sensor do anything more than give a ta… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
I have a cat 277 and the aux hydrolics do not work I have
I have a cat 277 and the aux hydrolics do not work I have replaced the right joystick and no progress … read more
Dan
Dan
Technician
6,710 satisfied customers
Bob cat ct230 the 3 point will not go up or down. Ct230**
bob cat ct230 the 3 point will not go up or down JA: What is the complete model and serial number of your machine? Customer: ct230**B ABFP11853 JA: Are you fixing this yourself? What have you tried so… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
Terex pt100G loader arms wont pickup loaded bucket unless
terex pt100G loader arms wont pickup loaded bucket unless you curl bucket or hit thumb switch for aux hyd then it works. also wont go into float or auto level … read more
Dan
Dan
Technician
6,710 satisfied customers
I just got an older 540L case backhoe, and I operate my
I just got an older 540L case backhoe, and I operate my control in a caterpillar pattern as an operator at work. This Is not in that mood, please advise on changing this stick pattern? Thank you. … read more
Dan
Dan
Technician
6,710 satisfied customers
I have a JD 1025R, the parking brake slips when engaged. I
I have a JD 1025R, the parking brake slips when engaged. I just had it in for service and asked the dealer to lock at it. They came back with $500.00 estimate to take the Back H off, just to look at t… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,272 satisfied customers
I have an ISX serial number: 79649606. It has chips in all
I have an ISX serial number: 79649606. It has chips in all exhaust lobes of camshaft. I would like to know if somebody could help me with removing and installing a camshaft? Have done some research on… read more
DR.Cummins
DR.Cummins
Field Service
High School or GED
2,254 satisfied customers
We needed a new condenser for Kubota 6800 air conditioning
We needed a new condenser for Kubota 6800 air conditioning system and ordered it online received the condenser but cannot tell how to hook up it looks different than the old one do you have any answer… read more
Dan
Dan
Technician
6,710 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