The 3D assembly needs WebGL, which this browser has switched off. Everything it shows is written out below: how the cone locks the segments into the ring, and the old threaded cover it replaces.
A valve cover that locks with a wrench. No hammer needed.
This valve cover system holds a mud pump valve cover with a cone and a collar of segments instead of a hammered thread. Tighten one nut and the cone wedges the segments out into a ring bolted to the pump. Back it off and the whole cover lifts out.
Drawn like an engineering sheet.
The valve cover lock assembly on a fluid end module, drawn with plain callouts. The letters match the key. Then the drawing resolves into the part.
What’s aheadThe lock cut open, taken apart, what each part does, then how it locks.
Half the assembly removed.
The ring is bolted to the module. Inside it, the insert: a collar of segments, pushed out into the ring’s grooves. The cone sits in the insert, its nut threaded onto the valve cover stud. Below, the valve cover on its seat, and the valve it keeps in the pump.
In the order it comes apart.
Fasteners, nut retainer, cone nut, cone, insert, valve cover and valve guide. The ring stays bolted to the module. Tap a name to read that part.
What each part does, one at a time.
The cone drives the segments outward into the ring.
Turning the cone nut draws the cone down through the insert. Its sloped wall wedges the segments outward until their teeth engage the ring’s grooves. Back the nut off and a spring pulls the segments in, so cone, insert and cover lift out through the ring.
In shortTurn the cone nut and the cone pushes the segments out into the ring. Back it off and the segments pull in, so the cover lifts out. A wrench, not a hammer.
Lock it. Release it. Lift it out.
Drag the cone nut sideways, the way a wrench turns it, or use the control. Then switch to the threaded cover it replaces.
The usual way: one person holds a pipe in the holes of a threaded cover while another swings a sledge hammer at the pipe to turn it.
A generic threaded cover, drawn for comparison. No figures implied.
A cone, a collar of segments, and a wrench.
What’s belowThe idea, half sections of the lock released and locked, then each step in order.
No big threaded cover holds the valve cover in. A ring stays bolted to the fluid end; a collar of segments sits inside it on the cover; a cone, drawn down by a nut on the cover’s stud, wedges the segments out into the ring’s grooves.
- The ring stays on the pump. It is coupled to the fluid end module around the valve cover opening, with studs or bolts, or welded, or formed as part of the module.
- The valve cover goes in through the ring and seats in the opening. The ring’s opening is large enough for the cover, the valve guide and the valve to pass.
- The insert drops in and sits on the cover. Its segments are held together as one piece by a spring and dowels.
- The cone goes into the insert. The cone nut, held in the cone by a retainer, threads onto the valve cover stud.
- Tighten the cone nut. The cone is drawn down and wedges the segments outward until their teeth engage the ring’s grooves, which hold the cover against the module.
- To change valves and seats, reverse it. Back the nut off, the spring pulls the segments in, and the cone, insert and cover come out through the ring. Access ports give a way in to lubricate or tap the segments free.
The ring stays on the pump. The cover goes in through it, the segments sit on the cover, and tightening the cone nut pulls the cone down to wedge the segments into the ring. To change valves and seats, back the nut off and lift it all out.
What it replaces: a threaded cover and a hammer.
A conventional valve cover is held in by a large threaded cover screwed into a threaded ring on the fluid end. Getting it tight takes a lot of turning force, and on a rig that is often done with a cheater pipe and a sledge: one person holds a pipe in the holes of the cover while another swings the hammer at the pipe.
| Threaded cover | Cone lock | |
|---|---|---|
| The parts | A threaded ring and a threaded cover | A ring, an insert of segments, a cone and a cone nut |
| How it is turned | A pipe in the cover’s holes, struck with a sledge | A wrench on the cone nut |
| Tooling | Cheater pipe and sledge hammer | A wrench or driver |
| Where the load goes | Through the threads | Through the segments into the ring’s grooves |
An illustrative comparison of two ways to hold a cover. It is not a rating, a torque figure or a time claim.
A concept built in code, not a product page.
Teardown makes interactive 3D pages that take a machine apart on screen, so a buyer can tap a part and read what it does. This one is a generic valve cover lock for a mud pump fluid end, drawn to explain the idea. It is not anyone’s product.
- Generic. Part names are plain descriptions. No part is a real catalogue item.
- Illustrative. Dimensions are rounded and the proportions are drawn for explanation. Nothing here is a rating or a specification.
- Yours next. The same treatment works for a real product, with your own drawings and parts list behind it.