Fire Truck Diesel Engine Repair. Every Major Engine. Every Major Problem.
Certified diesel mechanic with 25+ years on heavy-duty engines. We work on Cummins, CAT, Detroit Diesel, PACCAR, Navistar, and Mack/Volvo powertrains found in fire apparatus.
A modern fire apparatus diesel is half engine, half emissions computer. When the DPF won't regen, when the DEF system codes, when the engine derates on the highway returning from a mutual aid call — that's not a job for whoever can get to the firehouse next week. We diagnose the actual fault, fix what's broken, and don't replace parts to find out.
Modern apparatus diesels are 80% emissions computer.
A 2010+ heavy-duty diesel is a fuel-burning machine wrapped around a tightly controlled emissions system. When the DPF won't regen, when the DEF dosing valve clogs, when the EGR cooler cracks and dumps coolant into the intake, the engine derates — and a fire truck that's derating to 5 MPH on the highway returning from mutual aid is a problem. Generic diesel shops will throw parts at it. We diagnose it, fix the root cause, and prove the system is back in spec.
Older apparatus engines.
Plenty of departments are still running pre-emissions Cummins ISL, Detroit Series 60, CAT C12/C13, and even older mechanical injection diesels. We service them all — and we'll tell you straight when a rebuild is the smart move versus chasing one more failure at a time.
Diagnostic capability.
Insite for Cummins, DDDL for Detroit, ET for CAT, Premium Tech Tool for Mack/Volvo, Diamond Logic for Navistar/International. Not a generic OBD-II reader — the real factory-equivalent tooling that reads, configures, and forces actuators correctly.
Questions about this service
Can you do an in-frame rebuild on-site? +
What about emissions-related warranty issues? +
Recent Fire Truck Repairs.
A representative slice of recent on-site work — the kind of failures that take an apparatus out of service and the kind of fixes that put it back in. Pump packing, DEF system faults, aerial hydraulics, multiplex electrical, brakes, charging systems, and everything in between.
Pump won't draft on the test pit
Rebuilt packing on a Hale Qmax mid-mount; pumped capacity at 150 PSI net pump pressure with paperwork.
Engine 4 — cranks but won't start
Cummins ISL fuel rail pressure fault; replaced high-pressure pump and primary filter; back in service by morning.
Aerial outrigger won't extend
Traced 12V supply fault to a corroded ground stud; replaced harness section; outrigger cycled and locked clean.
Tank-to-pump valve seized after mutual aid
Removed and serviced the Akron actuated valve; flushed debris; re-tested under draft.
Multiplex panel showing all faults
Class1 IO module replacement after a wet-environment fault; reprogrammed and tested every output.
Rear discharge gate leaking under pressure
Replaced seat and seal kit on a Waterous CSU two-and-a-half-inch gate; pressure tested to 250 PSI.
Engine derating mid-response
Detroit DD13 DEF system fault — failed quality sensor and clogged dosing valve; cleared and re-ran regen.
Air brakes won't release after sitting
Replaced moisture-fouled relay valve and added a desiccant cartridge to the air dryer; full system test.
Aerial rotation slow and creeping
Rebuilt rotation hydraulic motor and replaced worn slew bearing balls; tested full 360° rotation under load.
Scene lights flickering on the foreground
Charging system pulled down by a failed alternator and one weak battery in a four-bank string; replaced both.
Other Fire Apparatus Services
Emergency Fire Truck Repair
When apparatus goes down between calls, the clock isn't a metaphor. We respond after hours with fully equipped mobile units to diagnose and repair on-site — so your house is back in service before the next tone drops.
Mobile Fire Truck Repair
No towing, no waiting in a dealer queue. We bring a fully equipped mobile shop to your apparatus bay or jobsite within 100 miles of Lansford, PA — most repairs completed where the rig sits.
Fire Pump Repair & Testing
Single-stage and two-stage centrifugal fire pump repair, packing replacement, transfer valve service, priming systems, and annual NFPA 1911 pump service tests. We make it pump rated — and prove it.
Aerial Ladder & Boom Service
Aerial ladder, platform, and tower hydraulic and mechanical service — including outrigger systems, rotation bearings, ladder slides, waterway, monitor, and pre-NDT mechanical readiness.
Fire Truck Annual Inspection
Mobile annual inspection support for fire apparatus — pump service test per NFPA 1911, brake system, steering, suspension, electrical, lighting, ladders, hose, SCBA bracketry, and complete chassis inspection.
Preventive Maintenance Programs
Quarterly and semi-annual PM scheduled around your duty cycle. Oil, coolant, hydraulic, brake, fuel, and air system service plus pre-failure inspection of pump packing, batteries, belts, and hoses.
Mobile Across the Mid-Atlantic.
100 Miles From Lansford, PA.
We come to your station, your bay, or your jobsite — across eastern PA, northern NJ, the lower Hudson Valley and Catskills, and northern Maryland.
Pennsylvania
Mobile fire truck repair across eastern and central Pennsylvania within 100 miles of Lansford — Lehigh Valley, Poconos, Philadelphia suburbs, Reading, Harrisburg, Wilkes-Barre, Scranton.
See PA coverageNew Jersey
Mobile fire apparatus repair across northern and central New Jersey — Bergen, Passaic, Morris, Sussex, Warren, Hunterdon, Somerset, and Mercer counties.
See NJ coverageNew York
Mobile fire truck repair across the lower Hudson Valley, Catskills, and southern tier of New York within our 100-mile service radius.
See NY coverageMaryland
Mobile fire apparatus repair in northern Maryland — Cecil, Harford, Baltimore, and Carroll county fire departments within our 100-mile radius.
See MD coverageRequest Mobile Fire Truck Service
A mechanic — not a service writer — reviews every request.