Built for heavy-equipment maintenance crews
Less hunting, less guessing, less interrupting, less repeating. More time on the machine.
Your OEM manuals, repair history, shift handovers and stocked parts, in one place your whole crew can reach from the machine. Manual answers show the manual and page they came from.
Wolf Vision
What's the main relief pressure spec?
Work equipment main relief (boom/bucket circuit):
Loader L-04
2026-08-21Hydraulic
Slow boom - main relief pressure low
Operator reported slow boom raise. Work equipment main relief pressure measured at 26.0 MPa, spec 31.4 MPa. Adjusted main relief valve about half a turn to bring it back to 31.4 MPa. Retested boom and bucket, OK. If pressure drops again, suspect the relief valve and replace it.
Shortened from a real answer.
A machine is down and production is waiting. None of what slows the job is unusual. It’s friction, and it adds up over every shift.
The answer is in there somewhere, spread across a 4,000-page shop manual, the parts program and the warehouse.
The fault has been fixed before. The fix lives in someone’s head, or in a work order nobody can find.
Your best mechanic becomes the crew’s search engine and spends the shift answering questions instead of fixing machines.
The handover note is missing half the detail, so the next shift checks it all again, and the supervisor is expected to remember what happened on every machine.
Your crew already knows how to fix machines. What slows them down is everything around the fix.
What less friction looks like
Three machines go down in the first hour: a haul truck, a dozer and a loader that’s dropping hydraulic pressure. The supervisor puts the two senior mechanics on the truck and the dozer. The loader goes to the newest mechanic on the crew.
Open the system overview for the loader’s hydraulics, built from the manuals loaded for that model: the main components and how they work together.
Instead of: pulling a senior mechanic off the truck to explain it.
Learn · Wheel Loader
How It Works
Path: Engine-driven variable pumps draw tank oil; work equipment pump feeds the control valve and cylinders, steering pump feeds the steering valve and cylinders; return oil goes back to the tank.
The hydraulic tank is enclosed and pressurized. As the cylinders work and the oil level and temperature change, tank pressure changes. The filler cap contains a relief valve that lifts to vent the tank when pressure exceeds its setting. The breather has a poppet that opens on the difference between tank and outside pressure, so a falling oil level cannot pull the tank into a vacuum. Its sleeve relieves the tank if pressure climbs too high.
The work equipment pump is a variable displacement swash plate piston pump driven by the engine. It turns engine rotation and torque into oil pressure, and it changes output by changing the swash plate angle. Two valves on the pump set that angle. The load sensing (LS) valve compares pump pressure at the control valve inlet with the load pressure at its outlet. It adjusts pump volume to hold that pressure drop constant, so the pump delivers what the actuators demand. The pressure compensation (PC) valve cuts pump volume as load pressure rises, so the pump never absorbs more power than the engine can deliver. Current to the pump's solenoid control valve shifts this pressure-to-volume relationship in proportion. The steering pump has the same construction and the same two valves.
In the control valve at rest, the unload valve sends the pump's minimum-angle flow to tank. A spring holds pump pressure at about 1.77 MPa, with LS pressure at zero. When a spool is operated and demand exceeds that minimum flow, the unload valve blocks the tank path and all pump flow goes to the actuators. With fine control, the unload valve opens once the gap between pump pressure and LS pressure reaches the spring load. The pressure compensation valves keep a lightly loaded actuator from taking all the flow in combined operation. Their pressure reducing section passes the actuator's load pressure into the LS circuit. The LS bypass plug bleeds that circuit to tank through a clearance filter and orifice, which slows the rise of LS pressure and improves stability. A main relief valve limits system pressure. For boom lowering, when lift cylinder bottom pressure is higher than head pressure, the regeneration circuit feeds return flow from the bottom side to the head side to speed the cylinder. The variable back pressure valve raises back pressure only during boom lower and bucket dump, to prevent a vacuum on the head side and ignition of the hydraulic oil. An accumulator charge valve takes oil from the main pump to supply an accumulator and the solenoid valve source pressure.
The steering valve sends steering pump oil to the right or left steering cylinder to turn the machine. Its steering relief valve holds circuit pressure during steering. A separate relief valve protects the steering pump's LS circuit from abnormal pressure.
The secondary steering pump and its motor sit on the right side of the transmission. They supply the steering circuit if the engine stops or steering pressure falls below the specified value. The controllers watch the steering pressure sensors. If steering pressure drops while travel speed is above the secondary steering "ON" value, the motor starts automatically. The operator can also run it with the secondary steering switch, regardless of pressure or speed. Keep switch operation to 60 seconds at a time, at no more than 5 km/h.
AI-generated overview — always verify critical specs and procedures against the original OEM manual.
How It Works and the component roles explain the system using this machine's manuals together with general mechanical knowledge. The checks, values and safety steps are taken from the manuals.
Diagnostic Starting Points
Follow your site's lockout and tagout rules before any repair. The steps below are what this machine's manuals add.
Before you touch it
Check these first
Boom or bucket moves slow or lacks force
AI-generated overview — always verify critical specs and procedures against the original OEM manual.
The boom and bucket are slow. EPC source pressure is normal, but all EPC output pressures measured at the levers are low. Which component should you suspect first?
Shortened from a real overview.
“Boom’s slow and the bucket’s got no breakout. Where do I start?” Ask with the loader’s shop manual open. It searches that manual, plus any others you add to the question, and comes back with the checks, citing the manual and page.
Instead of: walking to the office, finding the right manual, scrolling hundreds of pages, then trying a second one.
Tap the citation and that page opens, so you can read it for yourself.
Instead of: taking an answer on trust.
Turn on repair history and past repairs on that unit show up alongside the answer. Tap one to see what was done.
Instead of: asking around the crew and hoping someone remembers.
Wolf Vision
Boom's slow and the bucket's got no breakout. Where do I start?
Boom and bucket both weak points to something common to the work equipment circuit, so start with the shared items before chasing the individual valves. The manual's pages are H-18 (boom slow/lacks lifting force) and H-24 (bucket slow/lacks tilt-back force).
Step 2: Quick checks
⚠️ WARNING: Release the remaining pressure from the work equipment circuit before opening anything. Follow TESTING AND ADJUSTING, "RELEASE REMAINING PRESSURE FROM WORK EQUIPMENT CIRCUIT." The manual warns pressure may not be fully released even after you do this, so take care (Shop Manual, Page 3025).
Step 3: Shared causes, cheapest first (Shop Manual, Pages 3025 and 3026)
Step 4: Check this unit's history
On 2026-08-21 this unit had a slow boom with main relief at 26.0 MPa against the 31.4 MPa spec. The relief valve was adjusted about half a turn and it retested OK. Check the main relief first. If it has dropped again, you have a recurring problem. Look for the cause (an unload valve leaking, a worn pump, or the relief valve itself) before adjusting it again.
Loader L-04
2026-08-21Hydraulic
Slow boom - main relief pressure low
Operator reported slow boom raise. Work equipment main relief pressure measured at 26.0 MPa, spec 31.4 MPa. Adjusted main relief valve about half a turn to bring it back to 31.4 MPa. Retested boom and bucket, OK. If pressure drops again, suspect the relief valve and replace it.
Shortened from a real answer.
With the loader’s parts book open, ask for the part. The answer gives the part number, and if you stock it, the number is marked in stock, with how many are on hand and where they sit in the warehouse.
Instead of: copying the part number into the warehouse program and checking there.
Wolf Vision
what's the part number for the relief valve on the control valve?
The relief valve on the main control valve is In StockMAT:70098101Qty:1HY2104VALVE;RELIEF;MAIN;723-30-91300, qty 1. It's listed as ".Valve, Relief" on Parts Book p.358 (2-spool, 3-valve, 6/8) and p.374 (3-spool, 4-valve, 6/10). The part number is the same on both configurations.
Seals listed with it (p.358 / p.374):
Page 358 · Parts Book
Search parts...
AI can make mistakes. Always verify critical specs and procedures.
Parts List4
723-30-91300— VALVE;RELIEF;MAIN;723-30-91300HY2104
MAT: 70098101
In stock: 1
1
700-13-31161— O-RING;700-13-31161HY2105
MAT: 70098102
In stock: 6
1
700-80-51190— RING;BACK-UP;700-80-51190HY2106
MAT: 70098103
In stock: 4
1
07002-13334— O-RING;07002-13334HY2107
MAT: 70098104
In stock: 8
1
Copy for Email
Shortened from a real answer.
Before the shift ends, the mechanic logs the repair, then writes the handover with the repair attached, mentioning the supervisor. Next shift, ask Old Mate about the loader and it answers from that handover.
Instead of: a note on the whiteboard that’s missing half the detail.
Shift Handovers · Old Mate
Main relief valve replaced, boom and bucket breakout back to normal, pressure set to spec and no leaks. Repair logged. Good to go back to the pit. @Brad Fenwick
Parts from the linked repair. To change them, edit the repair.
Old Mate·Loader L-04What was done on this machine last shift?
Last shift was the 14 Oct Night shift handover, and the main job was replacing the main relief valve in Workshop Bay 2. It's marked Finished and logged as the 2026-10-14 repair.
What happened
Status: The handover says it's good to go back to the pit.
It's worth a quick pressure check at the next PM to confirm the new valve is holding.
Stocked parts:
• VALVE;RELIEF;MAIN;723-30-91300 — 723-30-91300 — 1 in stock, HY2104 (MAT 70098101)
• O-RING;700-13-31161 — 700-13-31161 — 6 in stock, HY2105 (MAT 70098102)
• O-RING;07002-13334 — 07002-13334 — 8 in stock, HY2107 (MAT 70098104)
Shortened from a real answer.
The newest mechanic on the crew has the information to work through the loader without pulling a senior mechanic away. The senior mechanics stay on their machines, and the next shift has a proper record of what happened.
Real examples from TroubleshootHD, in a simplified view. Manual pages are blurred here because they’re the manufacturer’s copyright. In your account you see your own manuals in full.
Jarrad Monger, Founder · Mechanic and supervisor · More than 23 years’ experience in Australia and Canada
I grew up in a mining town in Western Australia and spent more than 23 years as a mechanic and supervisor, the last eight at an underground mine in northern Canada. Every problem on this page is one I dealt with myself.
The one that stayed with me was turnover. Good mechanics moved on, new ones started, and what the last crew knew went with them. The answers were in the manuals and the work orders, but nobody on a breakdown had time to dig for them.
I built TroubleshootHD so what a crew learns stays with the crew, and the newest mechanic can find it when they need it.
You deal with me directly. If it doesn’t fit the way your shop works, tell me.
Jarrad
Unlike a general chat tool, it works from your organization’s own manuals and records, scoped to the machine you’re on. TroubleshootHD uses AI to search and explain your manuals and records. Specs, part numbers and procedures are answered from the manuals you’ve loaded, with the source page cited so the information can be checked before anyone acts on it. If the manuals don’t cover something, TroubleshootHD is designed to say so rather than guess. The AI can make mistakes, so always check the cited source before acting on the information.
Your manuals and records stay yours, and they’re never used to train AI models.
TroubleshootHD isn’t trying to replace your CMMS. There’s no integration to build and nothing to install.
Work orders, scheduling, costs and the official record. SAP, Maximo, Pronto or whatever you run stays the system of record.
Your OEM manuals, repair history with parts and photos, shift handovers, and your stocked-parts list. It’s what the crew reaches for at the machine.
Past work orders from a spreadsheet export. Shops running on paper or spreadsheets simply start from today.
Better you hear it here than after you’ve signed up.
Your organization is ready as soon as payment goes through.
Pick a plan and create an account with email or Google.
A guided wizard walks you through a model, then the units you run. Manuals loaded against a model are shared with its units.
Drag in the PDFs you have: service, operation, parts. Each one is prepared in the background while you carry on.
Send email invites. An invite only works for the email it was sent to.
Import past work orders and your stocked-parts list.
Join during beta and pay half price for the first six months, then 25% off the regular price for as long as you stay subscribed.
Canada, Australia and the US are billed in their own currency. Everywhere else is billed in CAD, with local tax included where it applies.
For crews and workshops
$27.50 CAD per seat, per month regular price $55
First six months. Then 25% off the regular price while subscribed.
3-seat minimum: $82.50 CAD a month for a crew of three.
Everything in Lone Wolf, plus:
For solo mechanics
$30 CAD per month regular price $60
First six months. Then 25% off the regular price while subscribed.
Need more AI requests or storage? Email me and we’ll sort it out.
For larger operations · Custom pricing
More storage, and set up with you directly.
Prices in CAD, billed monthly, plus applicable tax. Every plan has a 30-day money-back guarantee.
TroubleshootHD is in active development and improving every week. You may come across a rough edge or the occasional bug, and some features will evolve as we learn from real shops. In return, founding members get 50% off for the first six months, a lower rate for as long as they stay, and a direct line to the founder. If something isn’t working for your crew, tell me and I’ll work to fix it or improve it. If TroubleshootHD isn’t right for you, the 30-day money-back guarantee applies, and your admin can export your data.
It works from the manuals you upload, whatever the make: service, operation and parts manuals as PDFs. It reads the text in a PDF. A scanned manual saved as page images can’t be searched until it’s run through OCR (text recognition).
Those are general tools. Out of the box they don’t know your fleet: which machine you’re standing at, what’s been done to it, or what’s on the shelf. TroubleshootHD is built around exactly that. It keeps your manuals, repair history, handovers and stocked parts in one place for the whole crew, with manuals and repair history filed by model and unit. Ask about a machine and it searches that machine’s manuals and history, and answers from the manuals cite the page so they can be checked. When a mechanic moves on, what they learned stays with the crew.
If your techs are uploading manuals to their own personal accounts, those manuals and your fleet’s details are sitting somewhere the company can’t see or control. Here they belong to your organization, and they’re never used to train AI models.
No. Every plan has a 30-day money-back guarantee instead.
Yes. Your admin changes the seat count in settings. Wolf Pack has a three-seat minimum.
Yes. Email me and I’ll help you get your first machines and manuals in.
You do. Your manuals and records are never used to train AI models.
We’re in beta, and the first shops are using it now. When a supervisor is willing to put their name to what it’s done for their crew, their words will go here. Until then, I’d rather show you nothing than make something up.
Not sure it fits your shop? Tell me what you run and I’ll tell you straight. — Jarrad
Get startedBook a quick demo and see how TroubleshootHD could fit your maintenance operation.
Book a demoor email jarrad@troubleshoothd.com
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