The YD21-014 to YD21-016 Fork Lift Jack Series is a professional equipment developed to address the pain points of "difficult adaptation, easy rusting of components, and high safety risks in fork lift maintenance scenarios". With "fork lift-specific adaptation + rust resistance and durability + safety compliance" as the core, it breaks through the limitations of traditional jacks such as "poor adaptation to fork lift scenarios, easy rusting, and non-compliance with standards", providing a lifting solution that "fits in, lifts stably, and lasts long" for fork lift maintenance. Its core advantages are as follows:
Traditional jack lift pads are fixed and cannot adapt to fork lifts with different fork arm spacings (e.g., narrow-fork fork lifts require small-spacing support, while standard fork lifts require wide-spacing support). The two-position lift pad of this series can be switched via a buckle: for example, when maintaining a Heli K30 (standard fork arms), switch to the wide position (200mm spacing); when maintaining a narrow-fork logistics fork lift, switch to the narrow position (150mm spacing). No additional dedicated lift pads need to be purchased, and the adaptation rate is 80% higher than that of traditional tools, making it particularly suitable for logistics parks with "mixed maintenance of multiple fork lift models".
- Low-Clearance Access: The minimum height of 65mm can easily extend into the fork lift chassis (most fork lift chassis clearances are 50-80mm) for lifting without removing the fork lift guard plate. Compared with traditional jacks (minimum height over 100mm), the low-clearance adaptation rate is increased by 100%. For example, when maintaining the fork lift steering system, traditional tools require removing the guard plate (taking 30 minutes), while this series can extend directly, saving 25 minutes of preparation time;
- High-Height Support: The maximum height of 710mm (YD21-015 in 5T mode) provides over 50cm of operating space after lifting, meeting in-depth operation needs such as disassembly of the fork lift chassis transmission system and replacement of fork arm bearings. No repeated heightening is required, adapting to the entire "lifting-maintenance-descending" process, and the efficiency is 50% higher than that of traditional tools.
The pump piston and ram adopt a three-layer chrome plating process, with a surface hardness ≥HRC60, which is not only scratch-resistant (metal debris is often encountered in fork lift maintenance) but also resistant to moisture (warehouse floors are prone to water accumulation) and dust (industrial plants have high dust levels). After 6 months of use in a warehouse environment with 80% humidity, no rust traces appear on the components; after 1 year of use in a dusty workshop, the wear of the chrome plating layer is ≤0.02mm. The maintenance cycle is 3 times longer than that of ordinary non-chrome-plated jacks (which rust in 3 months), reducing tool replacement costs in maintenance scenarios.
The base and cylinder are welded by robotic automation, and the welds undergo flaw detection (no false welding or missing welding). When the 4T model (YD21-014) lifts a 4T fork lift, the cylinder leakage is ≤0.1ml/hour; when the 7T model (YD21-016) bears a peak load of 7T, there is no risk of base cracking. The service life is 2.5 times longer than that of assembled jacks, adapting to the "high-frequency, heavy-load" operation characteristics of fork lift maintenance.
- Overload Protection Valve: Complies with ANSI/ASME and GS/CE standards, and instantly cuts off the oil circuit when exceeding 10% of the rated load. For example, when the YD21-016 (7T load capacity) lifts a 7.7T heavy object, the valve activates immediately to avoid ram bending or cylinder bursting. The safety factor is 60% higher than that of jacks without compliant valves;
- Anti-Slip Base: The bottom of the base has serrated anti-slip patterns, with a friction coefficient ≥0.85 on cement ground, ensuring no displacement during fork lift maintenance. It is particularly suitable for "single-side lifting for tire replacement" scenarios, avoiding safety accidents caused by fork lift tilting.
The 4T model (YD21-014) has a net weight of only 33kg, which can be carried to the side of the fork lift by one person with both hands; the 7T heavy-duty model (YD21-016) has a net weight of 48kg, which can be easily moved by two people in collaboration. It is 20% lighter than traditional fork lift jacks of the same specification (mostly over 60kg). For example, maintenance personnel in logistics parks do not need to use a fork lift to transport the tool; a single person can complete equipment scheduling, saving 1 hour of tool transportation time per day and improving maintenance efficiency.
Scenario Requirement: Replace the rear tire of a Heli K30 fork lift (weight 3.8T, chassis clearance 70mm), requiring low-clearance lifting and quick positioning, and rust resistance in the warehousing environment.
Operation Process:
- One person carries the YD21-014 (33kg) to the bottom of the fork lift's rear wheel; the minimum height of 65mm easily extends into the chassis, and the two-position lift pad is switched to the wide position (adapting to fork arm spacing).
- Press the pump lever to lift the fork lift to the maximum height of 406mm, with the tire 10cm off the ground. Secure the fork lift to prevent sliding, remove the old tire, and install a new one.
- After maintenance, slowly release pressure to lower the fork lift to its original position. The chrome-plated ram shows no rust from dust in the warehousing environment; the whole process takes 40 minutes.
Result: Low-clearance adaptation eliminates the need to remove the guard plate, and the lightweight design saves labor. Compared with traditional tools (requiring two people to carry), the efficiency is increased by 40%, suitable for high-frequency tire replacement scenarios in logistics parks.
Scenario Requirement: Adjust the levelness of the fork arms of a Hangcha CPCD50 fork lift (weight 4.8T, fork arm height needs to be raised to 600mm), requiring 5T load capacity and high-height support, and precise operation in the maintenance workshop.
Operation Process:
- Two people push the YD21-015 to the bottom of the fork lift's fork arms, switch to the 5T load mode (minimum height 350mm), and align with the fork arm support points.
- Press the pump lever to lift the fork arms to the maximum height of 710mm, calibrate the fork arm angle with a level, and fix the positioning bolts after adjustment.
- Slowly release pressure to lower the fork arms to the target height (600mm); the two-position lift pad supports stably, and the whole process takes 1.5 hours with no fork arm shaking.
Result: The dual-load mode adapts to 5T heavy loads, and the 710mm high height meets adjustment needs. Compared with traditional low-stroke jacks (requiring multiple heightenings), the efficiency is increased by 50%, meeting the precise maintenance standards of 4S stores.
Scenario Requirement: Maintain the transmission system of a Hangcha X70 fork lift (weight 6.5T, chassis clearance 68mm), requiring 7T load capacity and low-clearance access, and durability in the dusty plant environment.
Operation Process:
- Two people cooperate to carry the YD21-016 to the fork lift's chassis; the minimum height of 65mm extends into the bottom of the transmission system, and the lift pad is switched to the adaptive position.
- Press the pump lever to lift the fork lift to a height of 420mm, leaving maintenance space. The chrome-plated components resist dust in the plant, avoiding rust that affects operation.
- Maintenance personnel disassemble the transmission components and replace worn parts; the jack shows no leakage or displacement during the 3-hour process. After completion, slowly lower the fork lift.
Result: The 7T heavy-load capacity and rust-resistant design adapt to industrial scenarios. Compared with ordinary jacks (prone to deformation due to insufficient load capacity), the maintenance safety is increased by 80%, ensuring in-depth maintenance of heavy-duty fork lifts.
Scenario Requirement: Perform daily maintenance (checking chassis bolts and cleaning impurities) on 10 Heli K30 fork lifts (all 4T class, chassis clearance 70mm), requiring efficient continuous operation.
Operation Process:
- One person uses the YD21-014 to lift each fork lift in sequence: the 65mm height extends into the chassis, and the fork lift is lifted to 300mm (below the maximum height to leave a safety margin).
- Maintenance personnel quickly check the chassis components; no repeated adjustment of the two-position lift pad is needed, and the maintenance time for a single fork lift is 25 minutes.
- Batch maintenance of 10 fork lifts takes only 4.5 hours. The lightweight design reduces personnel fatigue, and the chrome-plated ram shows no rust from moisture in the freight station.
Result: No failures occur during high-frequency operations, and the lightweight + rust-resistant design adapts to batch maintenance. Compared with traditional tools (requiring frequent maintenance), it saves 2 hours, improving the turnover efficiency of fork lifts in freight stations.
A1: The overload protection will be triggered, and lifting is not recommended. The rated load capacity of the YD21-014 is 4T, with an overload protection threshold of 4.4T. Although 4.3T does not exceed the threshold, it is close to the safety upper limit: during lifting, the safety valve may frequently "cut off and restore oil supply", leading to unstable ram lifting and lowering and affecting maintenance operations; moreover, the chrome-plated ram of the 4T specification bearing a 4.3T load for a long time will accelerate the aging of seals (service life reduced from 5 years to 2.5 years), increasing maintenance costs. To lift a 4.3T fork lift, models such as the YD21-015 (in 5T mode) and above should be selected.
A2: It is mostly caused by impurity blockage in the position buckle, insufficient lubrication, or buckle deformation. Troubleshoot in the following steps:
- Clean impurities: Use a screwdriver to remove dust and metal debris (easily left in fork lift maintenance) from the buckle gap; if impurities are tightly stuck, blow them out with compressed air (0.3MPa);
- Add lubrication: Apply lithium-based grease (industrial grade) to the sliding part of the buckle, and switch positions repeatedly 5-8 times to ensure smooth buckle expansion and contraction;
- Check for buckle deformation: If jamming is accompanied by a "click" sound, check whether the buckle is deformed due to collision. Slight deformation can be corrected by bending; for severe deformation, contact the manufacturer to replace the original buckle (priced at 30-50 yuan/piece) to avoid damage to the lift pad caused by forced switching.
A3: Two people can carry it easily through correct posture + auxiliary tools. The specific tips are as follows:
- Correct carrying posture: Two people stand on both sides of the equipment respectively, hold the metal handles on both sides of the base (load-bearing design area) with both hands, bend their knees and straighten their waists to exert force with their legs. Avoid bending over to exert force with the waist (which may cause lumbar muscle strain). This posture can reduce physical consumption by 30%;
- Use a flat cart: If the carrying distance exceeds 5 meters, place the YD21-016 on a flat cart with a load capacity ≥100kg. Two people push both sides of the cart respectively, moving labor-savingly with the help of wheel rolling, saving 60% of physical strength compared to direct carrying;
- Use fork lift assistance: If there is a small fork lift in the plant, place the tool on the fork arms and transport it directly to the side of the target fork lift. Lower it vertically and fine-tune the position, which is suitable for long-distance transportation of heavy-duty models.
A4: Scratches are normal wear and tear, and rust resistance can be restored through repair and maintenance. The specific solutions are as follows:
- Mild scratches (no exposure of the base
