Coolant Housing Bolck Assembly 302981
Product Name: Coolant Housing Block Assembly (Part No. 302981)
Description:
This component is a coolant housing block assembly, a precision-machined stainless steel component designed as an integral part of the wet-end cooling system for high-pressure waterjet intensifier pumps . It serves as the structural mounting interface and coolant distribution block located between the pump crankcase and the high-pressure cylinders (typically three per pump assembly) .
The housing block assembly functions in conjunction with the pump's coolant circulation system, directing cooling fluid around the high-pressure cylinders and dynamic seal areas to dissipate operational heat . Operating at pressures up to 60,000 PSI, this component is essential for maintaining thermal stability during extended cutting operations.
According to manufacturer documentation, the Coolant Housing Assembly (302981) is used with the one-piece plunger design and serves as a direct replacement for part number 300743 . The complete assembly includes internal components such as the housing body (300744), lip seal (202398), seal washer (300745), and retaining ring (200913) .
This assembly is classified as an "inspect" component during Minor Maintenance and as an "inspect" component during Major Maintenance according to official service guides, indicating it is not a routine replacement item but requires periodic inspection for wear or damage .
Applications:
Mounts between the pump crankcase and high-pressure cylinders in waterjet intensifier pump assemblies
Directs cooling fluid around the high-pressure cylinder and dynamic seal areas
Serves as a structural mounting block for three cylinders in the pump wet-end
Suitable for ultra-high pressure waterjet systems operating at 60,000 PSI and above
Features:
Corrosion-Resistant Metal Construction: High-grade alloy body ensures longevity and resilience in demanding waterjet cutting environments
Integrated Cooling Function: Directs coolant flow to manage heat generation in high-pressure sealing areas
Precision-Engineered Housing: CNC-machined to tight tolerances for proper fit and alignment with cylinders and crankshaft
Complete Assembly: Includes housing body, lip seal, seal washer, and retaining ring for drop-in replacement
OEM Compatibility: Direct replacement for P/N 300743 ; matches P2040 V-pump cooling housing configuration
Inspection Component: Classified for periodic inspection rather than automatic replacement during standard maintenance intervals
Maintenance:
Component Relationships (Pump Assembly Context):
In the complete wet-end assembly, the coolant housing (3 per pump) mounts between the crankcase and the cylinder . The coolant housing hoses connect at top and bottom to complete the cooling circuit .
When removing the wet-end assembly, if a coolant housing sticks to the cylinder, disconnect the coolant hoses and allow the housing to remain attached to the cylinder during removal . All three coolant housings must be rebuilt together when any cylinder requires service .
Inspection Schedule:
According to OMAX service documentation :
Minor Maintenance: Classified as "Inspect" (not automatically replaced)
Major Maintenance (every 4,500-5,000 hours): Classified as "Inspect" - check for wear, cracks, or sealing surface damage
Overhaul: May require replacement based on condition
Failure Diagnosis:
Coolant Leakage: Visible coolant weeping from housing connections or seals indicates seal failure
Overheating: Excessive pump operating temperature may indicate restricted coolant flow through the housing block
Visible Wear: During disassembly, inspect housing surfaces for scoring, corrosion, or sealing surface damage
Seal Condition: Check the lip seal (202398) and seal washer (300745) for wear or hardening, as these are internal components of the assembly
Inspection and Replacement Procedures:
Special Tools Required: OMAX disassembly tools (PN 301578B and 301644C) are available to aid in seal component service
Handle as Set: If one cylinder has problems and the wet-end assembly has been removed, all three cylinders must be rebuilt . The coolant housings should be handled as a matched set .
Disconnection Procedure: When a coolant housing sticks to the cylinder during disassembly, disconnect the hoses (top and bottom) from each coolant housing before proceeding
Seal Replacement: When servicing, replace the lip seal (202398), seal washer (300745), and retaining ring (200913) as part of a complete rebuild
Torque Compliance: When reassembling the wet-end assembly, torque the clamp plate nuts to the values specified in the service manual (up to 175 ft-lb / 235 N-m)
Seal Ring Note: If the wet-end was fully assembled, torqued, and then removed, the ring seals are not reusable and must always be replaced
Full Depressurization: Before any maintenance, shut down the pump, lockout/tagout the main AC disconnect, and ensure the system is fully depressurized
Proper Tools: Never use a pipe wrench on equipment; use proper sized open-end wrenches and metric sockets
Cross-Reference Information:
Complete housing for V-pump (ready for installation), interchangeable with ZYO013Z
Internal components: housing body (300744), lip seal (202398), seal washer (300745), seger ring (200913), straight connection (201215), angle connection (201217)
Also referred to as "House Block Assembly" in some catalogs
