General
Engine (only covers engine removal and adjustment not engine repair)
HST
Reduction Gear
Steering
Axle
Brake
Body
Steering
Body
Lift Arm and Bucket Bracket
Cylinders
Oil Pump
Oil control valve
Hydraulic systems
Appendix
Wiring diagram
Toyota Skid Steer 4SDK3 4SDK4 4SDK5 4SDK6 4SDK8 4SDK10 factory workshop and repair manual
- Safety first
- Wear safety glasses to protect from acid splashes and flying debris.
- Wear acid-resistant gloves (nitrile or rubber) to handle the battery safely.
- Work in a well-ventilated area away from sparks, flames, or smoking — batteries emit hydrogen gas.
- Remove jewelry (rings, watches) to avoid accidental short circuits.
- Keep a baking soda/water solution nearby to neutralize any acid spills.
- Tools you’ll need (each tool described and how to use it)
- Adjustable wrench
- Description: A single wrench with an adjustable jaw for different nut sizes.
- How to use: Open the jaw to fit the battery terminal nut, place on the nut, pull the handle steadily to loosen or tighten. Use for terminal nuts if you don’t have the exact-size wrench.
- Metric/open-end or box wrench set
- Description: Individual fixed-size wrenches or a set in common metric sizes (8, 10, 12 mm etc.).
- How to use: Match the wrench size to the terminal or clamp bolt, push onto the nut fully, and turn slowly to loosen or tighten; use for battery hold-down and terminal nuts.
- Socket wrench (ratchet) with metric sockets
- Description: Ratchet handle with removable sockets (sizes in mm).
- How to use: Fit the correct socket onto the ratchet, place on the bolt head or nut, and turn the ratchet handle back and forth to remove or tighten quickly; useful for hold-down bolts and tray bolts.
- Pliers (slip-joint or needle-nose)
- Description: Gripping tool for clamps, wire ends, and removing small clips.
- How to use: Grip corrosion shields or plastic clips and pull gently; use needle-nose for confined spaces.
- Wire brush or battery terminal cleaner
- Description: A stiff-bristled brush (brass or steel) specifically for cleaning battery posts and clamp interiors.
- How to use: Hold the brush firmly and scrub the battery post and inside the terminal clamp until shiny metal appears; remove loose corrosion first with a dry cloth.
- Terminal puller (optional)
- Description: Tool that pulls battery cable clamps off posts without prying.
- Why optional: Helpful if clamps are stuck; not required but prevents damage.
- How to use: Fit puller over post and clamp, turn center bolt to lift clamp off evenly.
- Battery carrier strap or lifting strap (or proper two-person lift)
- Description: Strap to lift the battery safely.
- How to use: Wrap strap around battery and lift using legs to prevent back injury; if no strap, get help — batteries can be heavy.
- Wire brush / sandpaper for cable ends
- Description: Small abrasive tool to clean corroded cable ends.
- How to use: Sand lightly to remove corrosion before reinstalling terminals.
- Multimeter (recommended)
- Description: Handheld meter to check voltage.
- How to use: Set to DC volts, place red lead to positive battery post and black to negative; a healthy charged 12V battery reads about 12.6–12.8 V at rest.
- Battery charger or jump starter (optional, recommended)
- Description: Charger to bring a discharged battery to full charge or jump-start device.
- Why: If the battery is not fully charged you should charge before reuse or to help test.
- How to use: Follow charger instructions — connect positive to positive, negative to negative, charge at slow rate if possible.
- Dielectric grease (optional)
- Description: Non-conductive grease to protect terminals from corrosion.
- How to use: Apply thin layer to terminal faces after tightening.
- Shop rags and baking soda
- Description: Rags for cleanup, baking soda to neutralize battery acid spills.
- How to use: Mix baking soda with water to neutralize any spills, wipe down.
- Extra tools you might need and why
- Torque wrench (recommended if available)
- Why required: Ensures terminal nuts and hold-down bolts are tightened to correct specification to avoid loose connections or damage.
- Typical target: Battery terminal nuts are commonly tightened to roughly 7–10 N·m (6–9 ft·lb) depending on terminal — tighten snugly but do not over-torque.
- Battery terminal replacement kit (boots, clamps, new cable ends)
- Why required: If terminals are corroded, cracked, or the clamps don’t fit tightly; new clamps ensure reliable electrical contact.
- Replacement batteries (specific size and specs)
- Why required: If the battery is old, fails voltage/load checks, or physical damage exists; see “replacement parts” below.
- Preparatory checks (quick, before you start)
- Confirm battery type and voltage by reading the label on the existing battery — most skid steers use 12V batteries but confirm.
- Note terminal orientation (positive left/right) and cable routing; take a photo if helpful.
- Park machine on level ground, set parking brake, and remove ignition key. Turn all electrical loads off.
- Step-by-step: how to remove and replace the battery (bulleted actions)
- Locate the battery compartment and remove any access covers using the appropriate sockets or wrenches; keep hardware in a safe place.
- Identify positive (+) and negative (–) terminals visually; positive often has red cover or cable.
- Disconnect the negative (–) cable first
- Use the correct wrench or socket to loosen the nut on the negative terminal clamp.
- Wiggle the clamp free; use pliers or terminal puller only if stuck.
- Move the cable away from the battery post and secure it so it cannot touch the battery or chassis.
- Disconnect the positive (+) cable next
- Loosen the positive terminal nut and remove clamp.
- Be careful: Do not let your wrench touch any metal while on the positive post and touching vehicle ground — that causes a short.
- Remove battery hold-down clamp or strap
- Use wrench or socket to remove bolts; keep bolts and washers for reuse unless damaged.
- Lift out the battery
- Use a lifting strap or two people; batteries are heavy and fragile — lift with knees, not back.
- Place the battery upright on a stable surface.
- Inspect battery tray, cables, and connectors
- If tray has heavy corrosion or holes, a tray replacement is required.
- Inspect cable insulation and connectors for fraying, corrosion, or damage.
- Clean terminals and cable clamps
- Scrub battery posts and clamp interiors with wire brush until clean metal.
- Neutralize any acid on the tray with baking soda/water if needed and rinse/dry.
- Test the old battery (recommended) with a multimeter or load tester
- Resting voltage above ~12.4 V suggests partial charge; ~12.6–12.8 V for full charge.
- If voltage below 12.0 V or battery fails a load test, replace it.
- Install the new or reconditioned battery
- Place battery upright in tray with same orientation as original.
- Secure hold-down clamp and tighten snugly with socket or wrench.
- Reattach positive (+) cable first
- Slide clamp over positive post, seat fully, and tighten the nut to snug torque.
- Avoid over-tightening; do not use pliers to crush terminals.
- Reattach negative (–) cable last
- Seat clamp on post and tighten snugly.
- Final order prevents accidental shorting while cables are disconnected.
- Apply dielectric grease lightly to terminals to retard corrosion.
- Replace any covers and secure battery compartment hardware.
- Start the machine to verify electrical function; check lights, starter engagement.
- Dispose of old battery through an approved recycling center or retailer — do not throw in trash.
- What replacement parts might be required and why
- New battery (required if old battery is weak, dead, or damaged)
- What to buy: Match voltage (likely 12V), physical group size that fits the tray, terminal orientation, and equal or higher Cold Cranking Amps (CCA) than OEM. Check label of old battery for exact specs; if label unreadable, check operator manual or take old battery to parts store.
- Why: Batteries degrade over time (sulfation, cell failure). Charging alone won’t restore capacity if cells are failing.
- Terminal clamps or cable ends (required if corroded or damaged)
- Why: Corroded clamps cause high resistance, poor starting, and charging problems.
- Battery hold-down or tray (required if cracked, rusted, or missing)
- Why: Proper hold-down prevents vibration damage and electrical shorts; a damaged tray can hold acid or break.
- Battery isolator or fuse (only if original shows damage)
- Why: If fusible links or fuses in the supply are blown, replacing them is necessary to restore proper protection; inspect inline fuses or fusible links during work.
- Battery charging or testing tools (multimeter/load tester) — optional purchase if you want to test batteries in future.
- How to choose the correct replacement battery (quick guide)
- Match voltage exactly (most skid steers use 12V; some heavy equipment may use 24V — confirm on existing battery).
- Match physical dimensions so battery fits tray securely.
- Match terminal positions so cables reach without stretching.
- Buy equal or higher Cold Cranking Amps (CCA) rating than OEM for reliable starts in cold or heavy-duty use.
- If unsure, bring the old battery or machine model to an auto parts store and ask for a direct-fit replacement (they can cross-reference sizes).
- Testing and final checks
- After install, measure resting voltage with multimeter: 12.6–12.8 V indicates full charge. If lower, charge the battery before use.
- Check for secure, tight connections — no movement of clamps on posts.
- Start engine and watch for unusual electrical behavior (dim lights, slow cranking).
- Re-check terminal tightness after first few operating cycles.
- Disposal and environmental note
- Return the old battery to the retailer or a recycling facility; most places accept used lead-acid batteries and may give a core refund.
- Do not dispose in household trash — lead and acid are hazardous.
- Short troubleshooting notes (if things don’t work)
- If engine won’t crank after replacement: check cable tightness, confirm battery voltage, check starter fuse/fusible link.
- If charging system not charging: test alternator/charging output (should be ~13.8–14.5 V with engine running) — if low, alternator or wiring could be faulty.
- Final practical tips
- Take a photo of cable routing before removing cables — helps correct reassembly.
- Always disconnect negative first and reconnect negative last to avoid shorts.
- If you are uncomfortable with heavy lifting or uncertain about electrical connections, get someone experienced to assist.
No unnecessary commentary — follow the steps above. rteeqp73
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