The Clark TM15 36V 18-125-17 forklift requires a 36V lead-acid traction battery, typically with a 125Ah capacity, matching the “18-125-17” designation in its model number. Compatible replacements include HAWKER® PzS series batteries, such as the PzS 335 or similar 36V traction batteries with 125–150Ah ratings. Ensure cells are arranged in 18-cell configurations (6 cells per 12V block) to maintain voltage compatibility. Pro Tip: Verify terminal alignment (SAE or DIN standards) and tray dimensions (approx. 530mm x 285mm x 405mm) before purchasing.
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What voltage and capacity are critical for Clark TM15 batteries?
A 36V nominal voltage is non-negotiable for TM15 models. Capacity ranges from 125Ah to 135Ah in standard configurations. Deep cycle traction batteries with 6V cells (PzS/L16 type) arranged in series achieve this—six 6V blocks create 36V systems.
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The TM15’s 18-125-17 model code specifies 18 cells (36V) and 125Ah capacity. Under heavy loads, expect 8–10 hours runtime. Pro Tip: Upgrade to 150Ah batteries (if tray space allows) for 25% longer shifts. For example, swapping from 125Ah to 135Ah extends pallet-moving cycles from 200 to 250 per charge. Always prioritize low-maintenance designs—sealed batteries reduce water topping frequency by 90% versus flooded types.
Which battery brands match Clark TM15 specifications?
Major compatible brands include HAWKER®, EnerSys®, and GS Yuasa®. The HAWKER PzS 335 (36V 125Ah) is OEM-approved, delivering 1,200+ cycles at 80% depth-of-discharge. Third-party options like CNOWN VCF125 offer 20% cost savings but require rigorous checks for post spacing (178mm) and weight distribution.
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| Brand | Model | Cycle Life |
|---|---|---|
| HAWKER | PzS 335 | 1,500 |
| EnerSys | ILP-125 | 1,300 |
| CNOWN | VCF125 | 1,000 |
Transitioning between brands? Ensure connectors match—SAE terminals need 19mm studs, while DIN types require M8 bolts. A logistics warehouse reported 32% fewer downtimes after switching from flooded EnerSys to sealed HAWKER batteries, citing reduced maintenance intervals.
How do physical dimensions affect compatibility?
The TM15 battery compartment requires 530mm(L) x 285mm(W) base dimensions. Height must not exceed 405mm including terminals. Common errors occur when selecting taller AGM batteries (up to 415mm)—even 10mm overages prevent secure lid closure.
Battery TypeHeightFlooded390–400mmAGM400–405mmLi-ion380mm (custom trays)Upgrade Example: Lithium-ion conversions save 200kg but demand tray modifications. Pro Tip: Use 3D scanners to verify clearance for cable bends—battery terminals should have 50mm radius zones.
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FAQs
No—48V systems overload 36V motors and controllers. Rewiring costs often exceed new battery investments.
What’s the lifespan of TM15 lead-acid batteries?
Expect 5 years with proper watering (flooded) or 4 years for AGM types. Replace when capacity drops below 80% of rated Ah.
