Truck Equipment Installation & Repair Flashcards

When installing auxiliary lighting on a work truck, what prevents overloading the existing circuit?

Answer: Adding a relay and dedicated fused circuit

A relay with a dedicated fuse lets accessories draw current safely without overloading factory wiring.

A telescopic crane mounted on a truck must be installed considering which key factor for stability?

Answer: Outrigger placement and load chart limits

Outriggers and adherence to the load chart keep the truck stable during lifting.

What is the purpose of a hydraulic reservoir breather/filter cap on a dump system?

Answer: To allow air exchange while keeping contaminants out of the fluid

The breather lets the reservoir vent as fluid level changes while filtering out dirt.

When installing a pintle hook for towing, the mounting plate must be rated to:

Answer: The maximum trailer gross weight and tongue load

Pintle hardware must handle the full trailer weight and vertical tongue load safely.

A hydraulic cylinder on a hoist drifts down slowly when holding a load. The most likely cause is:

Answer: Internal seal leakage or a leaking control valve

Internal leakage past cylinder seals or the valve lets fluid bypass, causing drift.

Why should U-bolts on a spring/equipment mount be torqued in stages and re-torqued after initial use?

Answer: Materials settle and clamping force must be re-verified for safety

Initial seating reduces clamp load, so re-torquing ensures the joint stays tight.

What protects a truck-mounted hydraulic system from cold-weather start damage?

Answer: Using proper viscosity fluid and warming the system before full load

Correct viscosity fluid and warm-up prevents cavitation and component damage in cold conditions.