Caterpillar

CAT engines power some of the hardest-working trucks and equipment—withstanding long grades, summer heat, winter cold starts, and heavy payloads. At Britt’s Diesel, we pair brand-informed diagnostics with spec-correct parts and procedures to restore power, reliability, and fuel economy while keeping downtime tight and predictable. Whether you run regional haul, construction, or RV applications with CAT power, our goal is simple: fix it right, document it clearly, and get you back on route.

Brand-Informed Diagnostics & Common Repairs

We don’t guess and swap. Our techs follow a test-first plan: live-data logging, fuel and oil pressure verification, boost/charge-air integrity checks, smoke/pressure testing, electrical integrity (grounds/voltage drop), and cooling performance under load. That workflow pinpoints the true failure so the repair sticks.

Issues we solve every week:

• Hard starts, low power, derates, excessive smoke
• Frequent regens / aftertreatment faults (where equipped): DPF/DEF/SCR, differential pressure, NOx, temp sensors, dosing and wiring
• Fuel & high-pressure oil system checks (HEUI/common rail), injector balance, aeration and restriction testing
• Turbo/charge-air leaks and VGT actuator problems
• Cooling & HVAC: overheating on grades, weak heaters, fan clutch control, CAC efficiency
• Oil/coolant leaks: front/rear main, rocker boxes, oil coolers, water pumps, liners/o-rings
• Electrical & harness repairs: intermittent codes, chafed looms, corroded connectors

Popular CAT Platforms We Service

From medium-duty to highway tractors and motorhomes, we support the CAT lineup with clear estimates and options by urgency.

Common engines & applications:

• C7, C9, C12, C13, C15 (including ACERT variants)
• Medium-duty vocational and regional trucks
• RV/motorhome and bus platforms with CAT power

We explain what’s required now versus what can be scheduled, so you can plan around loads and deadlines.

Major Repairs: Engine Overhauls & Replacements

When a repair goes beyond routine service, we scope the job carefully and build a plan around your uptime:

Overhauls & in-frame/out-of-frame work

• Failure confirmation: compression/leak-down, oil analysis, injector return/balance, cooling and boost integrity
• Cylinder head, liners/pistons, bearings, oil pump, timing components, full gasket/seal kits, and overhead set to spec
• Aftertreatment integration (where equipped): DPF cleaning/replacement, sensor calibration, EGR/DEF checks to prevent post-overhaul regens and derates
• Replacement options: approved reman long blocks/engines when economics or downtime favor a swap

Final validation includes hot/cold starts, no-load/load road tests on grade, leak/boost checks, and data logs. You leave with VIN-level documentation for compliance and resale records.

Preventive Maintenance & Fleet Programs

Eastern Sierra routes punish cooling and aftertreatment systems—PM matters. We tailor intervals to duty cycle, altitude, and ambient temps.

PM coverage:

• Oil & filter service matched to use case
• Fuel filtration & water separator service
• Coolant testing/exchange; hose, clamp, and CAC efficiency checks
• Transmission/axle/PTO fluids to spec
• Brake/air-system inspection, tires & wheel ends, torque/mounting audits
• Battery/charging load tests and electrical integrity checks

Fleet customers get priority scheduling, consolidated invoicing, PM calendars, and proactive advisories so small issues don’t become roadside events.

Compliance Support (BIT/DOT)

We prep CAT-powered units to pass the first time. Our inspection checklist covers lighting, brakes, tires, leaks, steering/suspension, and documentation. If we find a deficiency, we correct it quickly and record the repair for audits.

Rely on a local team that knows Caterpillar. Book service with Britt’s Diesel and keep your CAT earning.