Construction and Road Equipment

Construction and road equipment repair questions? Ask a mechanic ASAP

Connect one-on-one with {0} who will answer your question

G'day, I have a Komatsu PC128uu-1, serial number 1494. I…

Customer Question
G'day, I have a Komatsu...
G'day, I have a Komatsu PC128uu-1, serial number 1494. I bought this machine with burnt wiring. I have obtained full service manuals for both the -1 and -2 machines however my serial number is ***** the range on both of these manuals (-1 manual starts at serial number 2347). I require some information on Hydraulic system testing and adjusting and a wiring diagram.
Cheers
Submitted: 5 years ago.Category: Construction and Road Equipment
Show More
Show Less
Ask Your Own Construction and Road Equipment Question
Answered in 7 hours by:
1/30/2017
Mechanic: Dan, Technician replied 5 years ago
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 14,844
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 try to help. What are you seeing for differences in the later serial number break? What information do you need for the hydraulic system testing and adjusting? What work are you doing to the hydraulic system and outside of replacing the burnt wiring, what circuits are you looking for for the electrical?

Ask Your Own Construction and Road Equipment Question
Customer reply replied 5 years ago
G'day Dan, the differences are the hydraulic pump and solenoid valves. Which is making it difficult to work out which wires go to the valves. It was only burnt under the rear of the engine so I only need wiring info for around the starter etc. The hydraulic system valves have been adjusted so the machine would run and operate with the machine computer bypassed. So I will require pressures to set it to standard. I have found what I believe to be the LS valve and the LS bypass valve but am unsure of what the one solenoid valve is that is on the pump is. Cheers
Mechanic: Dan, Technician replied 5 years ago

Thanks for the update.... Let me do some checking on the early manual for your serial number.... I will be on the road most of the day tomorrow EST here but will see what I can come up with and let me know. So far I found the later one that you have.... also starts at 1715

https://www.tradebit.com/filedetail.php/190075878-download-komatsu-pc128uu-1-pc128us-1-excavator-manual

Ask Your Own Construction and Road Equipment Question
Customer reply replied 5 years ago
Thanks mate no worries. If its any help, the machine is what we call grey iron in Australia. Aka a Japanese import.
Mechanic: Dan, Technician replied 5 years ago

Yes, It is considered the same here in the US as well. It is going to be tough to find that manual in the US or AU Markets. And if found it will likely be in Japanese unfortunately.

Ask Your Own Construction and Road Equipment Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Dan Your Own Question
Dan
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 14,844
14,844 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

Related Construction and Road Equipment Questions
Location of all Hydraulic Filters on a Komatsu PC200LC.
Location of all Hydraulic Filters on a Komatsu PC200LC … read more
TomcM28
TomcM28
Owner
Associates
14 satisfied customers
I have a Komatsu PC300LC-5L, SN: A71585. Mice made a mess of
I have a Komatsu PC300LC-5L, SN: A71585. Mice made a mess of wires in the cab behind right side console. There are a couple control modules that I will need a schematic with pinouts on the connectors.… read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
Pc128 komatsu excavator I have changed all necessary seals
Please good morning, pc128 komatsu excavator I have changed all necessary seals but still is working slow… read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
Need a complete manual control for komatsu dozer model
need a complete manual control for komatsu dozer model #39e-1 … read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
I have a komatsu d66s. It has an earlier serial number. The
I have a komatsu d66s. It has an earlier serial number. The machine won't move forward or reverse. We replaced the ecm thinking it might be the problem. Removed one of the test ports and plenty of oil… read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
Well I bought a Komatsu backhoe and can't release the
Well I bought a Komatsu backhoe and can't release the parking brake to bring it home. I think it is similar to some of the Cat models. Is there a better place to look for info on Komatsu? … read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
I have excavator pc55mr yanmaar. This machine problem is
This machine problem is when I put the safety lever up or down its work in both direction … read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
I am a diesel mechanic with little knowledge on bulldozers.
Hi I am a diesel mechanic with little knowledge on bulldozers. … read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
Dan do you have any pictures of how the injectors on the
Hey dan good afternoon do you have any pictures of how the injectors on the Komatsu PC220-8 ?… read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
I have a PC128UU-1. Serial #1609. That won't start batteries
I have a PC128UU-1. Serial #1609. That won't start batteries are charged keyswitch has power to it. when you turn the key on there's no power stops coming in. Was thinking a bad ground. Not sure what … read more
Keiphun Sowell
Keiphun Sowell
Owner Brothers Restoration/Troubleshoot
AutoDiesel Technology
2,737 satisfied customers
Can you replace a standard hydraulic pump with a high flow
Can you replace a standard hydraulic pump with a high flow on a 2004 SK1020T? Also I have a very slow bucket on the bucket cylinders? full speed on lift and driving … read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
Bobcat 863 has code ec-7 temp out of range. when I pull out
bobcat 863 has code ec-7 temp out of range. when I pull out the sensor there is no coolant in there but there is supposed to be , I have read this uses hydraulic fluid to cool itself but don't no how … read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
I have a Komatsu D39 EX dozer and all the hydraulics have
I have a Komatsu D39 EX dozer and all the hydraulics have quit working which is all functions the pump seems to be working. What might be the problemw3?… read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
I have a komatsu d65 ex 15 ser.. 67019 engine over heating..
I have a komatsu d65 ex 15 ser.. 67019 engine over heating.. In 85 degrees. .. fluids good.. rad clean. New water pump and thermostat... i entered the computer and entered 1005 for 100 % fan speed.. i… read more
Dan
Dan
Technician
Auto Mechanics 1&2/diesel mech
14,844 satisfied customers
On Saturday, Feb 15th I requested information re: the
On Saturday, Feb 15th I requested information re: the location of the engine family name. I was given two answers which helped me to locate the ID tag with a family number, but the number is ***** The… read more
Fieldtech59
Fieldtech59
416 satisfied customers
For KOMATSU Expert: D 66S-1 1989 TRACK LOADER HST TROUBLE
komatsu d66s-1 HYDRAULIC HST trouble. Machine stopped traveling.slowed down had to keep lowering rpms at intervals to keep machine going slower and slower . hst trouble lamp stopped functioning in cab… read more
Expert
Expert
Kamatsu d21 left steering clutch will not disengage. Where
Kamatsu d21 left steering clutch will not disengage. Where is the adjustment loaction. The machine has sat idle for some time. The right side was stuck but started to work fine, jus tthe left side is … read more
Fieldtech59
Fieldtech59
416 satisfied customers
Hi - I have a 2001 Bobcat 322 mini excavator. The lifting capacity
Hi - I have a 2001 Bobcat 322 mini excavator. The lifting capacity of the boom is greatly diminished. I could only lift a 5' box blade a couple of inches off the ground. Downward pressure (force) seem… read more
Fieldtech59
Fieldtech59
416 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.

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

2,324 satisfied customers

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

Wayne

Wayne

Journeyman

1,298 satisfied customers

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

Cat Man

Cat Man

Cat Engine Expert

578 satisfied customers

I am ASE Master Certified.

dieseldan55

dieseldan55

Mechanic

299 satisfied customers

Road Mechanic for Volvo Construction Equipment.

Chris (aka- Moose)

Chris (aka- Moose)

Technician

85 satisfied customers

24 years of experience diagnosing & repairing

Steve

Steve

Mechanic

42 satisfied customers

Heavy Equipment Mechanic for 25 years

JBFixxer

JBFixxer

Mechanic

22 satisfied customers

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

< Previous | Next >

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