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Toyota 1DZ-II engine factory workshop and repair manual download

- Safety first
- Wear gloves, safety glasses, steel-toe boots, and avoid loose clothing.
- Work on level, solid ground; do not rotate tires on ramps or soft surfaces.
- Never work under the machine supported only by a hydraulic jack — always use rated jack stands placed under the manufacturer's approved lift/support points.
- Chock wheels that remain on the ground to prevent movement.
- Disconnect battery or place forklift in neutral with parking brake set and wheels chocked if required by the vehicle type.

- Tools required (detailed descriptions and how to use each)
- Hydraulic floor jack (rated for the forklift’s axle load)
- Description: a low-profile, heavy-duty jack capable of lifting the axle or wheel assembly.
- How to use: position the jack saddle under the manufacturer's lift point close to the wheel you’ll remove; pump handle to lift; raise only as much as needed to remove the wheel. Use slowly and steadily.
- Why required: lifts wheel clear of ground to remove/install wheels. Must be rated for the weight.
- Jack stands (pair, rated for the forklift)
- Description: adjustable steel stands with locking pin/ratchet and load rating stamped on them.
- How to use: place under the forklift’s recommended support points after lifting with the jack; lower the vehicle onto the stands and confirm stability before working.
- Why required: provides a safe, stable load-bearing support so you can work under/around the lifted wheel.
- Lug wrench or tire iron (proper size for lug nuts)
- Description: long-handled cross wrench or straight wrench that fits the lug nut hex.
- How to use: break lug nuts loose before lifting (apply force with your body weight); use a cheater bar only if necessary and safe.
- Why required: to remove and tighten lug nuts.
- Torque wrench (click-style, appropriate torque range for lug nuts)
- Description: adjustable torque wrench that clicks at the set torque (ranges like 10–150 ft·lb or higher as needed).
- How to use: set desired torque per manufacturer specification and tighten lug nuts in a star/cross pattern until wrench clicks.
- Why required: ensures lug nuts are tightened to spec to prevent wheel loosening or stud damage.
- Breaker bar (long non-ratcheting bar)
- Description: long solid bar used to apply extra leverage to break stubborn lug nuts loose.
- How to use: fit socket on lug nut, apply steady force — avoid jerky motions.
- Why required: older/larger lug nuts can be very tight and need extra leverage.
- Socket set (impact or heavy-duty sockets sized for lug nuts)
- Description: high-quality sockets sized to match lug nuts (impact-rated if using impact gun).
- How to use: use with breaker bar, torque wrench, or impact wrench as appropriate.
- Why required: proper fit prevents rounding lug nuts.
- Wheel chocks (heavy-duty)
- Description: rubber or metal chocks to prevent rolling.
- How to use: place in front and behind wheels remaining on ground.
- Why required: prevents movement of the machine.
- Gloves and safety glasses
- Description: mechanics gloves and ANSI-rated eye protection.
- How to use: wear them during all steps.
- Why required: protect hands and eyes.
- Wire brush/cloth and penetrating oil (e.g., PB Blaster)
- Description: small tools for cleaning corroded mating surfaces and helping loosen rusted nuts.
- How to use: spray and allow penetrating oil to soak; brush corrosion from hub face and studs.
- Why required: prevents seized parts and ensures proper seating of wheel.
- Pry bar or rubber mallet
- Description: small pry bar to free a stuck wheel; rubber mallet to tap wheel into place.
- How to use: pry gently around hub or use mallet to persuade wheel on/off hub.
- Why required: wheels can seize on corroded hubs and need persuasion without damaging parts.
- Tire pressure gauge and air source (if pneumatic tires)
- Description: dial or digital gauge; compressor or shop air with appropriate regulator.
- How to use: check and set tire pressure to OEM specification after installation.
- Why required: correct pressure for load capacity and even wear.
- Valve core tool (if removing/inflating tires)
- Description: small tool to remove valve core and allow rapid deflation/inflation.
- How to use: depress and unscrew valve core if you must deflate; reinstall core and inflate to spec.
- Why required: safe deflation/inflation when you must remove a tire from the rim (more common when replacing tires).
- Optional impact wrench (electric or pneumatic)
- Description: high-torque powered tool for removing lug nuts quickly.
- How to use: use carefully to avoid overtightening; final torque always set with a torque wrench.
- Why optional: speeds removal but requires care and a torque wrench to correctly finish tightening.

- Additional/extra tools (why they might be required)
- Hub puller or wheel puller
- Why: wheels on forklifts can seize on hubs from corrosion; a puller safely applies even force to remove the wheel.
- Bearing packer or grease gun
- Why: if you find bearing wear or need to service bearings, these are required.
- Replacement valve stems or tube (for pneumatic tires)
- Why: old valve stems leak and should be replaced when servicing the tire.
- Tire demounting tools or shop service
- Why: if replacing the tire tread or changing a tire on the rim you may need specialized tire changing tools or a shop because forklift tires (solid or industrial pneumatics) are often heavy and require machines.

- Before you start — checks and preparation
- Verify wheel/tire type: pneumatic, solid, or cushion. Solid/cushion tires can’t be rotated like automotive tires; they wear differently.
- Check machine manual for rated jack points and lug torque specs. If manual not available, get OEM specs from dealer.
- Inspect tires for damage, sidewall cuts, tread depth, uneven wear, and confirm they’re same size and compatible for rotation.
- Determine rotation pattern appropriate for the forklift (see below).

- Rotation patterns and considerations
- Do not mix tire types or sizes between axles (e.g., pneumatic vs solid; different diameters).
- For identical tires front-to-rear, use a cross-rotation pattern when possible: move front-left to rear-right, front-right to rear-left, rear-left to front-left, rear-right to front-right — maintain bead/direction if tires are directional.
- For directional tires, rotate front-to-back on the same side only to maintain direction of rotation.
- If front and rear tires are different sizes or have different duties (steer vs drive), do not swap axles unless manufacturer allows.
- For single-axle/pair setups, follow manufacturer guidance; if uncertain, swap left-right on the same axle rather than front-to-rear.

- Step-by-step procedure (concise bullets)
- Chock wheels that will remain on ground and set parking brake.
- Break lug nuts loose while wheel is on ground (use lug wrench or breaker bar).
- Position hydraulic jack under approved lift point and raise until the wheel clears ground.
- Place jack stand under approved support point and lower the machine onto the stand; confirm stability.
- Finish removing lug nuts and remove wheel. Use penetrating oil and gentle pry or mallet if wheel is stuck.
- Clean hub mating surface with wire brush; inspect studs for damage or corrosion.
- Move wheel to its new position per rotation pattern.
- Mount wheel on hub, start lug nuts by hand to avoid cross-threading.
- Lower jack until wheel contacts ground but not full weight; tighten lug nuts in a star/cross pattern by feel.
- Fully lower vehicle off jack stands and remove jack/stands.
- Torque lug nuts to OEM specification with torque wrench in star/cross pattern.
- Check tire pressure and adjust to specified psi.
- Test drive slowly (or operate forklift at low speed in safe area) and re-check torque after first few hours of use.

- Inspection and possible part replacements (what, why, and signs)
- Tires
- Why replace: tread worn below safe depth, irreparable sidewall damage, bulges, ply separation, or uneven wear compromising stability.
- Replacement part: same-size OEM or equivalent industrial forklift tire (specify solid, pneumatic, or cushion per axle).
- Valve stems / inner tubes (pneumatic)
- Why replace: leaking, brittle, or damaged during service.
- Replacement part: new valve stem or tube matching wheel rim type.
- Lug nuts and wheel studs
- Why replace: stripped threads, rounded nuts, or stretched studs risk wheel separation.
- Replacement part: correct grade studs and nuts specified by manufacturer (use new nuts if old ones are damaged).
- Wheel bearings / seals
- Why replace: noise, play in wheel, overheating, or grease leakage.
- Replacement part: bearing set and seal kit matching hub assembly; may require hub rebuild.
- Brake hardware (if wheel access reveals issues)
- Why replace: worn pads/shoes, damaged drums/rotors, leaking wheel cylinders can affect safety.
- Replacement part: brake pads/shoes, drums/rotors, or wheel cylinders per OEM spec.
- Hub components and spacers
- Why replace: corrosion, damaged mating surfaces can prevent proper seating and torque.
- Replacement part: hub hardware per OEM.

- How to tell if replacement is required (quick checks)
- Visual: deep cuts, bulges, exposed cord/fabric, dry rot on tires.
- Tread depth: uneven or below safe threshold for load-handling.
- Movement/play: wheel wiggle when lifted and rocked indicates bearing or stud problems.
- Noises: grinding, rumbling, or clicking indicate bearing/brake issues.

- Torque and re-check recommendations
- Always use the OEM-specified torque for lug nuts; if unknown, consult dealer/manual. If forced to use a provisional number, use a conservative mid-range only until you confirm OEM spec — then re-torque to spec.
- Re-check lug nut torque after the first shift/use and again after a few hours of operation.

- Final safety reminders
- Never rely on only the jack; always use jack stands.
- If any component is beyond basic tightening/cleaning and appears damaged (bearing, hub, brake parts, severely worn tire), stop and get professional service.
- If tires are solid/cushion or special industrial types, consider having a trained forklift service shop perform rotation or replacement.

- Quick summary of parts most commonly replaced during rotation
- Tires (matching type and size)
- Valve stems/tubes (pneumatic)
- Lug nuts or studs (if damaged)
- Wheel bearings/seals (if play/noise)
- Brake components (if worn/damaged)

- Final note
- If you lack a properly rated jack/jack stands for forklift duty or encounter seized/damaged components, use a certified forklift service to avoid catastrophic failure.
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