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Hydraulic & Transmission Service Flashcards

7 cards from real CFA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Hydraulic & Transmission Service flashcards as text

  1. What is the role of the transmission modulator valve in an automatic forklift transmission?

    Answer: To regulate the shift quality by controlling clutch pack engagement pressure

    The modulator valve controls how quickly and firmly clutch packs engage during shifts, directly affecting shift smoothness and transmission longevity.

  2. Mixing different brands or types of hydraulic fluid in a forklift system can cause:

    Answer: Additive incompatibility, foaming, and accelerated seal deterioration

    Different hydraulic fluids may have incompatible additive packages that react to cause foaming, sludge, and seal damage when mixed.

  3. During a pre-shift inspection, you notice the hydraulic fluid level is above the maximum mark on the dipstick. What should you do?

    Answer: Report the overfill to a supervisor and do not operate until corrected

    Overfilled hydraulic systems can cause fluid aeration, foaming, and seal damage due to excess pressure — the forklift should be reported and not used until the level is corrected.

  4. What symptom would indicate that the tilt cylinder has a blown internal seal?

    Answer: The mast tilts but cannot be held at a fixed angle under load

    A blown tilt cylinder internal seal allows fluid to bypass the piston, causing the mast to creep forward or back instead of holding the set tilt angle.

  5. What is the purpose of a transmission inching pedal (or inching valve) on a forklift?

    Answer: To allow the operator to control travel speed independently of engine RPM for precise positioning

    The inching pedal partially disengages the transmission clutch, allowing the operator to raise engine RPM for lifting power while keeping travel speed slow for precise load placement.

  6. A forklift that travels normally in forward but slips or has no drive in reverse most likely has a problem with the:

    Answer: Reverse direction clutch pack in the transmission

    Separate clutch packs control forward and reverse in automatic transmissions, so a fault in only one direction points to the corresponding directional clutch pack.

  7. How often should hydraulic hoses on a forklift be formally inspected beyond the daily pre-shift check?

    Answer: According to the manufacturer's preventive maintenance schedule, typically every 250–1,000 hours

    Manufacturer PM schedules specify periodic hose inspections at defined hour intervals to catch degradation before hoses fail under pressure.