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ENGINE / OFF-HIGHWAY
Caterpillar C13 / C15
Cat C13 / C15 power plants are common in on-highway and off-highway machinery. HEUI pump health, sensor drift and oil pressure regulation are the usual culprits.
SYMPTOMS
What you'll notice
Tell-tale signs the Caterpillar C13 / C15 is asking for attention.
- Low power, hard start and white smoke
- Erratic temp gauge and fan-clutch behaviour
- Low oil pressure warning at idle
- Excess crankcase blow-by
DIAGNOSTICS
How we find the fault
- 1
Cat ET scan
Read all ECM faults, snapshots and performance history.
- 2
HEUI pressure test
Verify injection actuation pressure across the speed range.
- 3
Sensor cross-check
Compare coolant, oil and boost sensor values against scan-tool reference.
- 4
Oil system flow test
Mechanical gauge verification at idle, mid and rated speed.
TYPICAL REPAIRS
What we fix on the Caterpillar C13 / C15
HEUI pump overhaul
Replace or rebuild HEUI pump, verify with Cat ET pressure logging.
Sensor replacement & cal
Replace drifted sensors, recalibrate via Cat ET.
Oil pressure regulator
Replace regulator and inspect pump, screens and bearings.
Common faults at a glance
Quick reference of the issues we see most on this platform.
- HEUI pump wear
- Coolant temp sensor drift
- Oil pressure regulator