Product Description
Clark CL 1808147 pump piston is an OEM replacement hydraulic component for the CJ55 manual pallet jack series, precision engineered for installation in the main pump unit. Constructed from hardened and polished steel, this piston ensures proper hydraulic pressure generation and seal fitment within the pallet jack’s lifting circuit.
Compatibility: Fits pallet jacks made by Clark, model CJ55. SKU: CL 1808147
Specifications
Compatibility
| Seal Kit Compatibility | Compatible with Clark seal kit CL 1808155 |
Hydraulic
| System Application | Hydraulic circuit—primary pressure generation in lifting system |
Material & Construction
| Material Specification | Precision-machined steel for hydraulic application |
| Finish | Machined and polished, oil compatible |
Part Numbers
| OEM Part Number | CL 1808147 |
| Manufacturer Part Number | CL 1808147 |
| Compatible with Models | Clark CJ55 manual pallet jack |
Frequently Asked Questions
Q: What does the CL 1808147 pump piston do in the Clark CJ55 hydraulic system?
A: The CL 1808147 is the primary piston in the main hydraulic pump unit of the Clark CJ55. It converts manual handle pressure into hydraulic pressure by moving inside the pump cylinder, drawing in and discharging hydraulic fluid to lift the load.
Q: What material is the CL 1808147 piston manufactured from?
A: The CL 1808147 is precision-machined and hardened steel with a polished surface finish. Hardness and polish are critical to maintain seal integrity, prevent scoring of the pump bore, and ensure long service life under continuous pressure cycling.
Q: How do I know if the CL 1808147 piston needs replacement?
A: Replace the piston if the jack fails to lift, builds pressure slowly, or leaks internally (fluid returns to the reservoir instead of raising the load). Worn or scored pistons cannot maintain seal contact and must be replaced during pump rebuild.
Q: Is the CL 1808147 a direct replacement for all Clark CJ55 models?
A: Yes. The CL 1808147 is a genuine Clark OEM pump piston designed as a direct fit for Clark CJ55 manual pallet jack pump units across the CJ55 series.
Q: What system application does the CL 1808147 serve in the CJ55 lifting circuit?
A: The CL 1808147 piston is the primary pressure generation component in the lifting system. It operates in the main pump unit and is responsible for building the hydraulic pressure needed to extend the jack mast and lift loads up to the jacks rated capacity.
Q: Can the CL 1808147 piston be used on other pallet jack brands?
A: No. The piston is engineered with specific geometry, diameter, and hardness for Clark pump bore specifications. Substituting incorrect pistons will cause leakage, loss of pressure, and hydraulic system failure.