Truck tool kit: what a professional should have in his arsenal in

Repairing and servicing trucks is a task that requires not only experience, but also the right set of tools. Unlike passenger cars, trucks have reinforced fastenings, large parts and specific systems (for example, air suspension or turbocharging), which dictate special requirements for tools. An error in choice can result in broken edges on bolts, damaged threads, or even injury - especially when it comes to working with heavy components at height.

In this article we will look at minimal and extended tool kits for trucks, focusing on specifics of European, American and domestic models (for example, Volvo FH, Scania R, MAN TGX, KAMAZ or MAZ). You will also learn which tools can be replaced with universal ones, and what you absolutely cannot save on. For convenience we have added key compatibility table with popular truck brands and a checklist for checking the contents yourself.

1. Basic set: what you can’t do without even on the road

If you are a truck driver or owner of a small fleet, your minimum set should fit in an under-seat box or luggage compartment but still cover 80% of common faults. This is not a case where you can get by with a "screwdriver and a hammer" - trucks require precision and strength.

Here's what should be in the basic kit:

• 🔧 Socket set (metric and inch) with ratchet and extension - required size 22 mm, 24 mm, 27 mm, 30 mm, 32 mm (standard for wheel nuts and axle mounts).
• 🔨 Bench hammer (500–800 g) and copper/brass hammer for working with aluminum parts (for example, radiators).
• 🔩 Open-end and spanner wrenches double-sided (sizes from 8 mm up to 36 mm).
• ⚙️ Torque wrench (range 40–210 Nm) - critical for tightening wheel nuts and cylinder head.
• 🔧 Universal pliers and pliers with insulated handles (for working with electricians).
• 🔩 Screwdriver set (including Torx T30–T55 and Hex 4–10 mm for modern trucks).
• 🛠️ Mount (length at least 60 cm) and crowbar for dismantling stuck parts.

⚠️ Attention: Cheap "soft" metal sockets often "lick" the edges on truck bolts, especially on Scania or DAFwhere high-strength steels are used. The optimal choice is heads from Hazet, Stahlwille or King Tony (series Heavy Duty).

2. Specialized tools for trucks

Trucks have components that are not found in passenger cars: a pneumatic system, long driveshafts, multi-disc brakes, etc. To service them you will need specialized tools, which are rarely found in standard sets.

Key positions:

• 🚛 Pneumatic fitting wrench (for example, Hazet 896-2) - for brake system and suspension connectors.
• 🔧 Wheel nut puller (for example, Stahlwille 710) - nuts on trucks are often over-tightened 600–1000 Nm.
• ⚙️ Valve adjustment wrench (for example, Jonnesway T3034A) - for engines Cummins, Detroit Diesel or YaMZ.
• 🔩 Turbine maintenance kit (special keys for fastening Holset or BorgWarner).
• 🛠️ Device for bleeding the brake system (for example, VAICO V10-0010) - pneumatics require a special approach.

⚠️ Attention: When working with a pneumatic system never use a regular compressor to inflate tires — the pressure in the truck circuits can reach 12–15 bar, and standard hoses are not designed for this. Use only certified equipment with a pressure gauge of at least accuracy class 1.6.

Truck make	Typical Mount Sizes	Specific tools
Volvo FH/FM	22 mm, 27 mm, 30 mm (wheels), 17 mm, 19 mm (engine)	Fuel pump adjustment wrench Volvo, hub puller Hazet 4972-1
Scania R/S	24 mm, 32 mm (bridges), 15 mm, 18 mm (turbine)	Special key for attaching the muffler Scania 99 367, clutch centering tool
MAN TGX/TGS	21 mm, 27 mm (suspension), 13 mm, 16 mm (injectors)	Valve clearance wrench MAN, brake drum puller
KAMAZ 6520/5490	22 mm, 30 mm, 36 mm (frame), 14 mm, 17 mm (block head)	Key for adjusting the injection advance clutch YaMZ-238, axle puller

3. Power tools: what you can and cannot use

Impact wrenches, screwdrivers and drills make the job much faster, but not all models are suitable for trucks. Main selection criteria:

• 🔋 Cordless impact wrench must have a torque of at least 600 Nm (for example, DeWalt DCF899 or Milwaukee M18 FUEL).
• ⚡ Corded impact wrench (for example, Ingersoll Rand 231C) - more reliable for stationary operation, but requires a compressor.
• 🔌 Impact drill (for example, Makita HP2071) - for drilling frames or removing stuck bolts.

⚠️ Attention: Never use an impact wrench to tighten wheel nuts on trucks - this violates manufacturer's specifications (e.g. Mercedes-Benz or DAF) and may lead to brake system failure. Wheel nuts must be tightened only with a torque wrench in 2–3 stages with checking the torque after 50–100 km.

Before purchasing a power tool, check:

4. Diagnostic and electronics tools

Modern trucks are equipped with dozens of electronic control units (ECUs), and without diagnostic equipment it is almost impossible to identify a fault. Minimum diagnostic kit:

• 📊 Truck scanner (for example, Texa Axone, Bosch KTS 590 or Launch X431 HD) - supports protocols J1939, J1708 and CAN.
• 🔧 Multimeter with sensor test function (e.g. Fluke 88V).
• 🔌 Adapter set for connection to diagnostic connectors (at Scania and Volvo they are different from the standard OBD-II).
• 💡 High voltage wire tester — to check the ignition system (relevant for gas trucks).

⚠️ Attention: When connecting the scanner to the truck always turn off the ignition and follow the manufacturer's instructions. For example, on DAF XF incorrect connection to the connector J1962 may cause the engine control unit to be reset (EDC).

What to do if the scanner does not see the truck?

1. Check the scanner's compatibility with your truck's protocol (e.g. J1939 for Cummins).

2. Update your scanner software (manufacturers often add support for new models).

3. Check the integrity of the diagnostic cable - connectors on trucks often oxidize.

4. If the problem persists, try connecting through a different connector (for example, J1708 instead of CAN).

5. Tools for working with the brake system

The brake system of a truck is not only pads and drums, but also pneumatic circuits, ABS and EBS. To service it you will need:

• 🔧 Brake pad puller (for example, Hazet 4961) - pads on trucks weigh up to 10 kg and fit tightly.
• ⚙️ Brake knuckle adjustment wrench (for example, Stahlwille 730).
• 🛠️ Device for bleeding the pneumatic system (for example, VAICO V10-0010).
• 📏 Vernier caliper - to measure the wear of brake drums (permissible wear is usually 2–3 mm).

⚠️ Attention: When replacing brake pads on trucks with EBS (for example, Mercedes Actros or Volvo FH) be sure to reset errors in the control unit after work. Otherwise, the system may lock the wheels or generate false alarms.

The process of adjusting the brakes on a truck:

1. Raise the axle on a lift or hang the wheels.
2. Remove the brake drum (a puller and hammer may be required).
3. Check the wear of the pads and drum (the permissible drum diameter is indicated in the manual).
4. Adjust the gap between the shoes and the drum using the eccentric knuckle.
5. Check the stroke of the brake chamber rod (must be within 20–40 mm).
6. Bleed the system and clear errors using a diagnostic scanner.

6. Tools for working with suspension and frame

Truck suspensions are subject to enormous stress, and repairing them requires not only strength, but also precision. Here's what you'll need:

• 🔧 Puller for silent blocks (for example, OTC 7315A) — without it, replace the silent blocks with MAN or Scania almost impossible.
• 🛠️ Hydraulic jack with a carrying capacity of at least 20 tons (for example, Bott 20T).
• ⚙️ Air suspension adjustment key (for example, Hazet 896-3).
• 📏 Laser level - to check the geometry of the frame after repair.

⚠️ Attention: When working with air suspension Always relieve pressure from the system before dismantling the elements. The pressure in the cylinders can reach 15 bar, and its sudden release can cause serious injury. Use a special bleed valve (usually located on the receiver).

7. Organizing storage: how not to lose a tool on the road

Tools for a truck should not only be of high quality, but also well organized. On the road, every minute counts, and searching for the right wrench in a pile of rusty nuts can result in downtime. Optimal storage solutions:

• 📦 Modular drawers (for example, Keter or DeWalt TSTAK) - allow you to divide the tool into categories (electrics, brakes, engine).
• 🔧 Carrying bags with rigid compartments (for example, Husky) - convenient for working on the road.
• 🏗️ Magnetic panels — for fastening keys and screwdrivers in the workshop.
• 🔖 Marking - use colored stickers or engraving to indicate key sizes (for example, 27 mm - red, 32 mm - blue).

⚠️ Attention: If you store your tool in a box under your truck seat, be sure to use desiccant (for example, silica gel). Condensation and temperature changes will quickly lead to corrosion of metal parts, especially in winter.

An example of organizing tools in a truck:

Box 1: Sockets (22–36 mm) + ratchet + extensions
Box 2: Open-end wrenches/spanners + torque wrench
Box 3: Power tools (wrench, multimeter) + diagnostic scanner
Seat bag: Screwdrivers, pliers, pry bar, flashlight

8. Top 5 mistakes when choosing truck tools

Even experienced mechanics sometimes make mistakes that lead to tool failure or damage to parts. Here are the most common:

1. Savings on socket heads — cheap analogues lick the edges on the bolts, which leads to their breakage (especially critical for bridge fastenings).
2. Using car jacks - load capacity 2–3 tons insufficient for a truck (minimum 20 tons).
3. Ignoring the torque wrench — overtightening the wheel nuts can lead to the breakage of the studs, and undertightening can lead to the wheels coming loose.
4. Operation without bleeding the pneumatics - this is not only dangerous, but can also damage the seals in the brake system.
5. Lack of diagnostic scanner - modern trucks are “blind” without it, and you will miss critical errors (for example, in AdBlue or DPF).

⚠️ Attention: If you work with gas trucks (CNG/LNG), all tools must be non-sparking (for example, beryllium bronze). Ordinary steel on impact can cause a spark and ignite gas.

FAQ: Frequently asked questions about truck tools

Can car tools be used on trucks?

Partially - yes, but only for auxiliary work (for example, screwdrivers or pliers). Key tools (socket heads, torque wrenches, pullers) must be specialized for trucks, since the loads and dimensions of the fastenings are much higher. For example, wheel nuts on Volvo FH tighten with force 650 Nm, and a standard passenger torque wrench can withstand a maximum 200 Nm.

What is the most reliable brand of truck tools?

The leaders in reliability are:

• Hazet (Germany) - optimal price/quality, wide range for trucks.
• Stahlwille (Germany) - premium segment, used at official service stations Scania and MAN.
• King Tony (Taiwan) - series Heavy Duty not inferior to European brands, but cheaper.
• Snap-on (USA) - the best choice for American trucks (Freightliner, Peterbilt).

For a budget option you can consider Jonnesway (Taiwan) or Force (Russia), but only for auxiliary work.

Do I need to buy a wheel nut puller if I can use a hammer?

No, Using a hammer to remove wheel nuts is strictly prohibited. On trucks these nuts are tightly tightened. 800–1200 Nm, and shock loads can:

• Damage the threads on the hub (repair will cost 15 000–30 000 ₽).
• Deform the brake disc (especially on Bendix or Knorr).
• Cause injury - metal fragments fly at high speed upon impact.

Puller (for example, Stahlwille 710) is worth 8 000–12 000 ₽, but preserves your health and the integrity of the truck.

How often should a tool be checked for wear?

Recommended frequency:

• Sockets and wrenches - inspect before each use (cracks, chips, wear on edges).
• Torque wrench — calibrate once a year (or after 5,000 puffs).
• Hydraulic tool (jacks, presses) - check for oil leaks every 6 months.
• Power tools — clean and lubricate once every 3 months (especially after working in dusty conditions).

Signs of critical wear: slipping of the head on the nut, play in the joints of the ratchet, corrosion on the working surfaces.

Is it possible to rent a tool for a one-time repair?

Yes, many services and stores (for example, Interskol, AllTools) offer rental of specialized tools. This is beneficial if you need:

• Wheel hub puller (1,500–3,000 ₽/day).
• Hydraulic press (2,000–5,000 ₽/day).
• Diagnostic scanner (3,000–8,000 ₽/day).

However, for regular work, renting will cost more than buying. For example, a puller for silent blocks will pay for itself after 3-4 uses.