24/7 Mobile Preventive Maintenance for Trucks & Trailers
Scheduled maintenance shouldn’t mean taking equipment out of service for days.
PH Fleet Services dispatches experienced mobile technicians to your terminal or fleet yard to perform preventive maintenance on trucks and trailers without disrupting your operations. We serve Pennsylvania, New Jersey, Delaware, Maryland, and New York around the clock.
- 24/7 services
Why preventive maintenance matters
A breakdown is never convenient, but most failures are avoidable. Brake chambers wear out slowly before they fail. Air line abrasion creates small leaks that grow over time. Electrical connections corrode long before lights stop working entirely. Preventive maintenance catches these problems early, when repairs are simple and cheap, rather than after a roadside breakdown that costs hours or days of downtime.
Many fleets and owner operators struggle to find time for scheduled maintenance. Taking a truck or trailer to a shop means pulling it from service, driving to the shop, waiting in line, and driving back. A full day out of service for a simple PM inspection is common. Mobile preventive maintenance solves this problem by bringing the technician to your equipment. PH Fleet Services performs inspections and routine maintenance at your terminal, yard, or parking location, often while drivers are on break or between loads.
Why choose PH Fleet Services
Mobile PM — we come to you
No need to drive equipment to a shop or wait in line for bays. Our technicians perform preventive maintenance at your location, on your schedule.
24/7 availability for fleet schedules
We work around your operations. Nights, weekends, and off-hours PM visits are available to minimize impact on revenue service.
Catch problems before they cause breakdowns
Our PM inspections identify worn components, small leaks, and developing issues before they become roadside failures. Repair what needs attention now, plan for what can wait.
Multi-state coverage
We serve Pennsylvania, New Jersey, Delaware, Maryland, and New York, covering fleet yards, terminals, and drop lots across the region.
Fleet and owner operator programs
We work with owner operators running one truck and fleets managing hundreds of trailers. Preventive maintenance schedules are adapted to your operation and usage.
Documentation for compliance
Every PM visit includes documentation of inspections performed, components checked, and any repairs completed. Keep your maintenance files current and audit-ready.
Preventive maintenance services
Trailer PM inspection
Trailers are often overlooked in maintenance programs until something breaks. A trailer that rolls down the road without complaint may still have developing issues — brake linings wearing thin, slack adjusters losing adjustment, air lines chafing against frame rails, lights that work intermittently, ABS sensors collecting debris, tires wearing unevenly, and suspension bushings cracking.
PH Fleet Services performs comprehensive trailer preventive maintenance inspections on-site. Our technicians check brake system components including chambers, slack adjusters, pushrod travel, and linings. Air system components are inspected for leaks, abrasion, and secure mounting. Lighting and electrical systems are tested for proper function and signs of wiring damage. Suspension components, frame condition, landing gear operation, and door function are verified. A written report documents the condition of each system and identifies any items requiring attention. Minor repairs are completed during the PM visit. Major issues are flagged for follow-up.
Tractor PM inspection
Tractors accumulate miles quickly, and preventive maintenance intervals measured in miles or hours are essential for reliability. A missed PM interval increases the risk of roadside failures — air dryer bypass, compressor issues, brake chamber failure, suspension component cracks, and fifth wheel wear.
PH Fleet Services provides mobile tractor preventive maintenance at your location. The inspection includes air brake system checks, air dryer and compressor verification, suspension and air bag inspection, fifth wheel operation and wear measurement, lighting and electrical system testing, ABS fault code check, and chassis lubrication. Our technicians carry common PM supplies including grease, thread locker, and replacement bulbs. The inspection report documents findings and recommended repairs.
Brake system PM
Brake systems are the single most common source of roadside out-of-service violations. Pushrod travel that exceeds legal limits, slack adjusters that have lost adjustment, brake linings worn below specification, and brake chambers with rust or damage all result in immediate OOS orders. These conditions develop gradually and are easily caught during scheduled brake system preventive maintenance.
PH Fleet Services performs brake system PM inspections in the field. Pushrod travel is measured and recorded. Slack adjuster function is verified. Brake lining thickness is checked. Brake chambers are inspected for cracks, rust through, and pushrod seal condition. Air lines to each brake are checked for chafing, cracking, and secure routing. Components found out of adjustment or nearing end of life are flagged for repair. Adjustments are performed on-site when needed.
Air system PM
Air systems leak. Fittings loosen, O-rings flatten, hoses dry and crack, air dryer cartridges become saturated, and purge valves stick. A small leak that goes unnoticed during daily operation can become a failure that leaves a truck or trailer unable to build pressure. Air system preventive maintenance identifies these small issues before they become big problems.
PH Fleet Services performs air system PM inspections including leak checks at all fittings, valves, and connections. Air dryer cartridge condition is assessed. Purge valve operation is verified. System build-up time is measured. Air line condition is checked for abrasion, cracking, and proper routing. Minor leaks are repaired on-site. Components approaching end of service life are noted for planned replacement.
Electrical system PM
Lighting violations are the most frequently cited roadside inspection violations. A single marker light out, a ground circuit that has degraded, or a wiring harness that has rubbed through can trigger a citation and potentially an out-of-service order. Electrical problems rarely fix themselves — they worsen over time.
PH Fleet Services performs electrical system PM inspections including function testing of all marker lights, brake lights, turn signals, and tail lights. Wiring harnesses are inspected for chafing, corrosion, and loose connections. Ground points are checked for cleanliness and secure attachment. ABS power and ground circuits are verified. Minor electrical repairs — bulb replacement, connector cleaning, minor wire repair — are completed during the PM visit.
Suspension and chassis PM
Suspension components wear gradually. Bushings crack, spring hangers develop hairline cracks, torque rods loosen, and air bags weather-check. By the time a suspension failure becomes noticeable through handling changes or ride quality, the damage is often severe and requires a roadside repair.
PH Fleet Services performs suspension and chassis PM inspections including air bag condition checks, bushing inspection for cracking and wear, torque rod fastener verification, spring hanger and bracket inspection for cracks, frame rail inspection for damage or corrosion, and fifth wheel wear measurement and lubrication. Findings are documented with recommended repair timelines.
24/7 preventive maintenance scheduling
Preventive maintenance does not need to happen between 8 a.m. and 5 p.m. on weekdays. PH Fleet Services offers PM visits at any time that works for your operation. After-hours service when trucks are parked for the night, weekend visits when terminals are quiet, and overnight PM for fleets that run 24/7 are all available. Our dispatch team works with you to schedule visits that minimize impact on revenue service.
For fleets with multiple trailers or trucks, we coordinate PM visits across your entire equipment list. Contact us to discuss fleet PM program pricing and scheduling.
Common issues caught during PM inspections
- Brake pushrod travel approaching limit: Adjusted on-site before an out-of-service violation occurs.
- Air line chafing: Rerouted or replaced before a blowout leaves the vehicle stranded.
- Intermittent lighting: Wiring connection cleaned or repaired before a roadside inspection citation.
- ABS fault code stored: Diagnosed and repaired while the vehicle is already parked for PM.
- Air dryer cartridge near end of service life: Replaced before it bypasses moisture into the air system.
- Slack adjuster losing adjustment: Replaced before brake performance degrades.
- Air bag weather-checking: Replaced before a blowout on the highway.
- Fifth wheel wear approaching limits: Planned for replacement before a coupling failure.
- Suspension bushing cracking: Flagged for upcoming repair before handling is affected.
Service areas
PH Fleet Services provides mobile preventive maintenance throughout Pennsylvania, New Jersey, Delaware, Maryland, and New York. Our technicians operate across the region, covering fleet yards, terminals, and parking locations where trucks and trailers are staged.
In Pennsylvania, we serve Philadelphia, Reading, Allentown, Harrisburg, and Lancaster, along with the surrounding counties and I-78, I-76, and I-81 corridors. In New Jersey, we cover Newark, Edison, Trenton, Cherry Hill, Atlantic City, and Toms River, with access to fleet yards serving the ports and distribution centers.
Delaware is served throughout the state, with particular coverage in and around Wilmington and the I-95 corridor. In Maryland, our service area includes Baltimore and the surrounding region. In New York, we provide mobile preventive maintenance in New York City and the surrounding metropolitan area.
If you are unsure whether your location falls within our service area for PM visits, call us at (888) 991-8657. Our dispatch team will confirm coverage and discuss scheduling options.
How our process works
1 : Schedule your PM visit
Call (888) 991-8657 to discuss your equipment and schedule. Provide the number of trucks or trailers, their location, and your preferred time window for the PM visit. Our dispatch team will confirm availability and provide a service window.
2: Technician arrives on-site
We dispatch a technician to your location at the scheduled time. The technician performs the agreed-upon PM inspection while your equipment is parked. For fleets with multiple units, we work through the list efficiently.
3: Inspection and minor repairs
The technician inspects each system, documents findings, and completes minor repairs — adjustments, bulb replacement, small air line repairs, lubrication — as part of the PM visit. Any significant issues requiring parts or extended labor are noted and discussed with you.
4: Report and follow-up
You receive a written report documenting the inspection, any repairs completed, and any items flagged for future attention. For fleet customers, we maintain records of PM visits for compliance and planning purposes.
Frequently Asked Questions
A standard trailer PM includes brakes (chambers, slack adjusters, pushrod travel, linings), air system (leaks, lines, air dryer), electrical (lights, wiring, ABS), suspension (air bags, bushings, hangers), frame, landing gear, doors, and tires. Tractor PM adds fifth wheel, chassis lubrication, air compressor checks, and additional cab systems.
Intervals depend on usage. Trailers are often inspected annually or every 30,000 miles. Tractors typically need PM every 15,000 to 25,000 miles or every 3 to 6 months. Contact us to discuss a schedule appropriate for your operation.
Yes. We work around your schedule. Many fleets prefer after-hours PM visits when trucks and trailers are parked and not needed for operations.
Our PM visits include minor repairs such as brake adjustment, bulb replacement, small air line repairs, lubrication, and fastener tightening. Major repairs identified during PM are discussed with you — we can complete them on-site during the same visit or schedule a separate service call.
We provide mobile PM in Pennsylvania, New Jersey, Delaware, Maryland, and New York, including major cities and freight corridors across the region.
Yes. Every PM visit includes a written report that documents inspection findings and any repairs performed. These records support your compliance files.
Yes. Contact us to discuss your fleet size and preferred PM intervals. We will work with you to establish a recurring schedule that keeps your equipment maintained without disrupting operations.
A thorough trailer PM inspection typically takes 45 to 75 minutes depending on the trailer type and condition. Tractors take longer. Multiple units can be completed sequentially during a single site visit.
Yes. Our trucks carry brake chambers, slack adjusters, bulbs, air line fittings, hose materials, grease, and other common PM parts. Most minor repairs identified during PM can be completed immediately.
Have the number of trucks and trailers, their location, and your preferred time window. For fleet accounts, we will set up a schedule and confirm details.
Need Preventive Maintenance for Your Fleet?
PH Fleet Services provides mobile preventive maintenance for trucks and trailers throughout Pennsylvania, New Jersey, Delaware, Maryland, and New York. From scheduled PM inspections to minor on-site repairs, our technicians keep your equipment reliable and road-ready.
