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Main brake cylinder (pneumatic hydraulic booster) LG22-JLB SDLG 4120000675
Main brake cylinder with pneumatic hydraulic booster LG22-JLB art. 4120000675 for SDLG equipment. Strengthens the pressure of the brake pedal, generates the working pressure of the brake fluid, standard mounting dimensions for replacing the original brake system.
Description
marker
Master brake cylinder (air booster) LG22-JLB SDLG 4120000675 - factory supplied from Mettlead
When your SDLG LG22's brake system begins to sag, every minute of downtime is costly.Master brake cylinder (pneumatic hydraulic booster) LG22-JLB SDLG 4120000675is a reliable solution that returns the car to normal braking force and eliminates leaks of working fluid. We supply this unit directly from the factory in China, which means you get original quality at a competitive price without overpaying to intermediaries.
Why choose this particular pneumatic hydraulic booster?
Trouble-free braking in difficult conditions
The LG22-JLB pneumatic hydraulic booster is designed specifically for wheel loaders that operate under high loads on construction sites, quarries and warehouses. Reinforced sealing collars and a corrosion-resistant housing ensure stable operation even with temperature changes and increased dust levels.
Fully compatible with OEM specification
The part is manufactured in strict accordance with the SDLG factory drawing and undergoes 100% tightness control. Therefore, the installation does not require modifications - the cylinder fits “bolt to bolt” into the standard seat, and hydraulic and pneumatic lines are connected without adapters.
Savings without compromise
Thanks to direct deliveries from the manufacturer Mettlead, you save up to 30% compared to the price at dealers. At the same time, the quality is confirmed by strict multi-stage control at each stage of production.
Application and Compatibility
Compatible equipment models
- SDLG (临工)LG22— wheel front loader
- Other SDLG models using brake cylinder part number 4120000675
Typical replacement scenarios
Here are the situations in which it is necessary to immediately replace the brake master cylinder (hydraulic booster) LG22-JLB:
- Feeling "cotton" in the brake pedal— the braking force is noticeably reduced, the loader brakes sluggishly and with an increased braking distance.
- Brake fluid leaks under the cylinder body- worn cuffs leak working fluid, which leads to a drop in pressure in the circuit.
- Uneven operation of brake mechanisms— due to internal corrosion or piston scuffing, pressure distribution is disrupted.
- Scheduled maintenance according to regulations— preventive replacement when standard wear is reached every 4,000–5,000 operating hours.
Specifications
| Parameter | Meaning |
|---|---|
| Name | Brake master cylinder (hydraulic booster) |
| Model | LG22-JLB |
| OEM number | 4120000675 |
| Applicability | SDLG LG22 (front loader) |
| Amplifier type | Pneumohydraulic (combined) |
| Housing material | Cast iron/aluminum alloy (anti-corrosion treatment) |
| Seals | Oil-resistant NBR rubber, increased service life |
| Operating pressure of the pneumatic circuit | 0.6–0.8 MPa |
| Quality control | 100% leak and stroke test |
| Packaging | Neutral / branded upon request |
| Manufacturer | Mettlead (China) |
OEM/ODM capabilities and custom packaging
Mettlead offers flexible terms of cooperation for wholesale buyers and distributors:
- White-label supplies— you receive products under your brand with your own labeling and instructions.
- Individual packaging— branded boxes, stickers and accompanying documentation for your layout.
- Strict quality control— each pneumatic hydraulic booster LG22-JLB undergoes bench tests before shipment.
- Flexible volumes- from a trial batch to large contract deliveries with a fixed shipment schedule.
In addition, we invite partners to visit our warehouse and production site in China to see for themselves the quality of our products and the reliability of our processes.
Client case: how the LG22-JLB pneumatic hydraulic booster solved the problem of the brake system
Our partner, a construction equipment rental company from Central Asia, filed a complaint: a “soft” brake pedal simultaneously appeared on two SDLG LG22 loaders, and traces of oil were found under the cylinders. The downtime of each machine cost the customer hundreds of dollars daily.
After receiving the request, we shipped twomain brake cylinder (pneumatic hydraulic booster) LG22-JLB SDLG 4120000675within three working days. Installation took about 40 minutes per piece of equipment - without any modifications. As a result, the standard pressure in the circuit was restored, the braking distance returned to the standard value, and the leaks were completely eliminated. The customer has since included this item in their regular parts purchasing plan.
Frequently asked questions (FAQ)
How does a pneumatic hydraulic booster differ from a conventional brake master cylinder?
Unlike a purely hydraulic cylinder, the LG22-JLB pneumatic hydraulic booster uses compressed air to further increase the pressure on the piston. This significantly reduces pedal effort and provides more efficient braking of heavy equipment even under high loads.
How do you understand that it’s time to change the LG22-JLB pneumatic hydraulic booster?
Pay attention to the following signs: increased brake pedal travel, fluid leaks at the cylinder installation site, uneven braking or a characteristic “hissing” of air when the pedal is pressed. Any of these symptoms indicate worn seals or housing.
Will this cylinder fit other SDLG series loaders?
This part is designed under catalog number 4120000675 and is guaranteed compatible with the SDLG LG22. If your forklift of a different model uses the same parts catalog number, the part will fit. If in doubt, send us the VIN or chassis number and we will check compatibility for free.
Are additional components required when replacing?
As a rule, when installing a new brake master cylinder (hydraulic booster), it is recommended to replace the brake fluid and check the condition of the pipelines. The cylinder itself is supplied assembled and ready for installation - no adapters or additional fasteners are required.
What is the delivery time and payment terms?
The standard delivery time from the warehouse is 1–3 business days. Delivery by international logistics companies takes from 7 to 20 days depending on the region. We accept payment by T/T, Western Union, and also discuss individual conditions for regular partners.
Request the best price for the LG22-JLB pneumatic hydraulic booster right now
Don't let equipment downtime eat into your profits. Send a request tomaster brake cylinder (pneumatic hydraulic booster) LG22-JLB SDLG 4120000675— and we will respond with the price, terms and delivery conditions within a few hours.
- ✅ Factory price without intermediaries
- ✅ 100% quality control before shipment
- ✅ Fast dispatch from a warehouse in China
- ✅ Support for White-label and custom packaging
Contact Mettlead today— indicate the required article, quantity and delivery address, and we will prepare a personal commercial offer for you.
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