Warranty & Safety
- Identify critical pump and trailer data required for warranty claims.
- Distinguish between standard warranty periods for DC and AC power units.
- Recognize environmental and installation factors that void manufacturer coverage.
- Inspection Mirror — Read data from the pump tag including model and serial number in tight mounting spaces.
- Flashlight — Illuminate the pump tag and the trailer frame to locate the last 6 digits of the VIN.
- Torque Wrench — Ensure mounting bolts are tightened to specification to avoid improper installation claims.
- Pressure Gauge — Verify system pressure is fully relieved before performing any hydraulic service.
Collect from the pump tag: model, serial number, date, and the last 6 digits of the trailer VIN.
Warranty: 2 years from manufacture on DC units, 1 year on AC units.
Not covered: improper install (e.g. over-torqued mounting bolts), improper application, negligence, tampering, abuse (low voltage, contamination, rust, wrong fluid).
Hydraulic injection can feel like a bee sting — go straight to the ER. Always depressurize first.
How It Works
Essential Data Collection
Technicians must collect four specific data points from the pump tag: the model, serial number, and date. Additionally, the last 6 digits of the trailer VIN must be recorded to validate the unit's history and application.
Warranty Period Variations
Coverage duration depends on the unit type. DC units carry a 2-year warranty from the date of manufacture, whereas AC units are limited to 1 year of coverage.
High-Pressure Safety
Hydraulic injection is a critical medical emergency that can feel like a simple bee sting. Technicians must always depressurize the system before work and seek immediate ER treatment if an injection occurs.
Diagnostic Chart
| Symptom | Check | Spec / Expected | Likely cause & fix |
|---|---|---|---|
| Component failure within 2 years of manufacture (DC Unit). | Inspect for over-torqued mounting bolts, tampering, or fluid contamination. | Per the applicable manual | Improper installation, negligence, or abuse voids the standard 2-year DC warranty. Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019) |
| Power unit internal rust or fluid degradation. | Analyze fluid for contamination and check for signs of moisture entry. | Per the applicable manual | Abuse, including wrong fluid or contamination, is not covered under warranty. Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019) |
| Intermittent operation or motor failure. | Test system for low voltage conditions during operation. | Per the applicable manual | Low voltage is considered abuse and is not covered by the manufacturer. Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019) |
| Skin puncture or sharp pain during pressure testing. | Verify if the technician depressurized the system first; treat as a medical emergency. | Per the applicable manual | Hydraulic injection resulting from failure to depressurize. Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019) |
At the Bay: Diagnose the Case
CASE 1 / 4
Component failure within 2 years of manufacture (DC Unit).
- Test
- Compare
- Correct
Select the next check
Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019). A likely cause is a hypothesis; confirm it with the applicable service procedure before repair.
Common Bay Mistakes
- ✕ Failing to record the last 6 digits of the trailer VIN.
- ✕ Assuming AC and DC units have the same warranty duration.
- ✕ Over-torquing mounting bolts during installation.
- ✕ Mistaking a hydraulic injection injury for a minor bee sting.
- ✕ Neglecting to depressurize the system before service.
- ✕ Using the wrong fluid type in the hydraulic reservoir.
Quick Check
Practice only — not scored.
Source: KTI DC Power Unit Troubleshooting Guide (Jan 2019) — 1–3