Kenworth T800

KenworthClass 8

Kenworth T800

The legendary do-anything workhorse.

Introduced in 1986 and nicknamed the 'Ultimate Workhorse,' the T800 became Kenworth's go-to vocational truck for dump, logging, tanker, and heavy-haul duty, with the wide-hood T800W rated to carry a Gross Combination Weight up to 330,000 lbs. After nearly four decades it was sunset alongside the W900 and C500, with production ending in 2026 over EPA emissions and component constraints.

Maker

PACCAR

Years

1986–2021

Body

Vocational

Rating

Up to 92,000 lb GVWR

Power

Up to 605 hp

Applications

Oilfield, Dump, Heavy haul

Engines

PACCAR MX-13Cummins ISXCaterpillar C15

Trouble with your T800?

Describe the symptom and Mike — the free AI truck consultant — will help you figure out what's wrong, which part is involved, and whether it's safe to drive. Free, no account.

Common replacement parts

Real products from the PartsNow catalog. Confirm fitment with Mike before ordering.

3030HNTRX - 3030 SPEC LONG SHAFT HNTRX BRAKE CHAMBER

3030HNTRX

3030HNTRX - 3030 SPEC LONG SHAFT HNTRX BRAKE CHAMBER

OTR10143 - AUTO SLACK ADJUSTER, 11/2-10DRIVE 5.5,6.5

OTR10143

OTR10143 - AUTO SLACK ADJUSTER, 11/2-10DRIVE 5.5,6.5

5-808330 - BRAKE KIT FOR 4709DEN SHOES

5-808330

5-808330 - BRAKE KIT FOR 4709DEN SHOES

370036A - OIL BATH SEAL

370036A

370036A - OIL BATH SEAL

348-4195 - HUB CAP (SENTINAL LARGE DIAM)

348-4195

348-4195 - HUB CAP (SENTINAL LARGE DIAM)

5008414PGBXW - AIR DRYER CARTRIDGE, PURAGUARD

5008414PGBXW

5008414PGBXW - AIR DRYER CARTRIDGE, PURAGUARD

11444 - GLADHAND BRACKET MOUNT

11444

11444 - GLADHAND BRACKET MOUNT

15W40 OIL - 15W40 OIL (ROTELLA) GAL JUG

15W40 OIL

15W40 OIL - 15W40 OIL (ROTELLA) GAL JUG

Brakes & Wheel End Air System Filtration Electrical & Lighting Suspension & Steering Cooling System Drivetrain Body & Cab Exhaust

Find parts at PartsNow.ai Call or text (865) 290-5485

Compare the T800

T800 vs T880 T800 vs W900

Guides from the shop

Air Dryer Not Purging? Diagnose Wet Tanks Fast

Air dryer not purging? Diagnose wet tanks fast with checks for governor, purge valve, heater, and cartridge on trucks like Kenworth T800.

Suspension & Steering

Kingpin & Bushing Wear: Steer Axle Play Diagnosis Guide

Learn the dial indicator method to check kingpin and bushing wear on your steer axle before DOT pulls you out of service.

Electrical & Lighting

Trailer ABS Light Won't Go Off? Sensor & Wiring Guide

Trailer ABS light staying on? Step-by-step diagnosis for wheel speed sensors, harness corrosion, and ECU faults before you swap parts.

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