Enerpac W4000X Low Profile Hydraulic Torque Wrench Drive

W4000X is the drive unit of the Enerpac W-Series X-edition low profile hydraulic torque wrench. It delivers a maximum of 5661 Nm (4175 ft.lbs) at 10,000 psi (690 bar), covers hexagon sizes from 36 to 85 mm (1 5/16 to 3 3/8 in) through interchangeable cassettes, and weighs only 2 kg (4.44 lb). Enerpac sells it as a strength-to-size solution for heavy-duty bolting where clearance around the nut is restricted.

Low profile bolting with quick-change cassettes

A low profile wrench uses a slim cassette that sits over the nut, driven by a separate drive unit. Enerpac describes the W4000X with a 30 degree rotation angle and a rapid return stroke for fast operation, a tough manifold design with an added operator safety feature, and a fast release drive unit that exchanges cassettes without tools.

The page states that the W-Series offers ATEX certification for potentially explosive environments, and that all X-edition drive units are “CE – ATEX declared”. The repair parts sheet we hold carries no ATEX marking, so ask for the current declaration and marking before specifying this tool for a hazardous area.

Key features as printed in the datasheet

• Maximum and nominal torque 5661 Nm (4175 ft.lbs) at 690 bar; minimum torque 566 Nm (418 ft.lbs) at 69 bar (1000 psi).
• Constant torque output with +/-3% accuracy across the full stroke.
• Fast release drive unit: cassettes swap without tools; disassembly for maintenance needs no special tools.
• Robust handles mount on both sides and on top of the cassettes.
• Optional enhanced tilt and swivel TSP300 manifold for horizontal and vertical manoeuvring.
• Compatible with W-Series and UltraSlim cassettes.

Technical specification

Drive unit data (Enerpac product page)

Compatible cassette codes listed by Enerpac

Service kits for W4000X drive units (parts sheet L4113)

Selection and ordering guide

Choose the cassette by the nut. The three “X” cassette series split the range into steps: W4105X to W4115X, W4200X to W4215X and W4300X to W4306X, and the SL cassettes W4203SL to W4215SL are also listed. Order the cassette and the drive unit separately, then add a pump and hoses for 10,000 psi.

Torque is set at the pump. The product page gives minimum torque at 1000 psi (418 ft.lbs) and maximum at 10,000 psi (4175 ft.lbs), so intermediate settings can be estimated by proportion: about 0.4175 ft.lbs per psi (derived value, confirm with the tool certificate). Enerpac also advises that loosening torque is about 250% of tightening torque, so check breakout loads against the 4175 ft.lbs limit.

Installation and operation notes

The only manual attached to the Enerpac page for the W4000X is the repair parts sheet L4113, which covers the cassette assembly (Figure 1), ratchet assembly with sideplates and guards (Figure 2), the drive unit and swivel assemblies (Figure 3) and the carrying cases (Figure 4). It points to the wrench instruction sheet for inspection, lubrication, maintenance, fastener torque specifications and accessories such as the extended reaction arm and reaction paddle, so obtain that sheet for operating limits.

From the parts sheet: the drive unit uses 10,000 psi screw-on couplings and nipples, a piston rod with retract link, and a swivel manifold post. Positioning handles come as SWH6A (angled) and SWH6S (straight). Enerpac recommends that all kit components be installed together when repairing the tool.

Applications in Oman and the GCC

A low profile drive of this size is used for flange and structural bolting where there is little radial room: process flanges, valve and pump casings, heat exchangers and similar assemblies in oil, gas and power plants. The page highlights oil and gas as an environment where restricted clearance is common. Temperature, dust and approval requirements should be verified for each site against the manufacturer documents.

Compatible accessories and related items

Named in the sources: W-Series and UltraSlim cassettes, the listed X and SL cassettes, SWH6A and SWH6S positioning handles, TSP300 tilt and swivel manifold, extended reaction arm, reaction paddle and the M2050 and M2100 carrying cases.

Frequently asked questions

What is the maximum torque of the Enerpac W4000X?

5661 Nm (4175 ft.lbs) at 10,000 psi (690 bar); the minimum rated torque is 566 Nm (418 ft.lbs) at 1000 psi.

What hexagon sizes can the W4000X handle?

36 to 85 mm (1 5/16 to 3 3/8 in) using compatible X-series cassettes; the SL cassettes W4203SL to W4215SL are also listed.

Does the W4000X include a cassette?

No. The listing is the drive unit only; cassettes such as W4110X are listed as compatible products and are ordered separately.

Is the W4000X ATEX rated?

Enerpac states that all W-Series X-edition drive units are CE – ATEX declared. Request the current declaration before using it in a hazardous area.

Can Seven Star LLC supply the W4000X?

Seven Star LLC is an independent supplier in Muscat and quotes this drive unit on request; send quantity and delivery details through the enquiry form.

Documents and quotation

The Enerpac repair parts sheet L4113 for the W4000X series (English, 12 pages) is attached to this page; it is a parts document rather than a full operating manual. Seven Star LLC is an independent supplier in Muscat and quotes on request. Confirm cassette codes and approvals with the manufacturer documents before ordering. Related tools: category.