GG20 Repair and Pressure Testing: What the Service Manual Covers

Updated 2026-10-07 · Sourced from ELAFLEX documentation

Short answer: The GG20 repair manual is written for authorized distributors, OEMs and service centres. It breaks the nozzle into the GG27 connector, GG5 lever, LG24 valve, LG2 inlet swivel and body assemblies, specifies three lubricants and Loctite 263, and requires a static test at 12 to 18 bar (174 to 260 psi) under water with a 27 N·m (20 ft·lb) bending load on the swivel, then a dynamic flow test with propane. Nitrogen or compressed air can substitute for LPG in testing. Repairs should be done by a qualified service shop.

This is an overview so you know what a proper repair involves. It is not a substitute for the manual or for a trained technician. ELAFLEX states it cannot be held responsible for the performance of repaired nozzles.

Main assemblies

GG27 connector assembly: connector nut, slide sleeve, 31 ball bearings, lip seals, split bearing and GG6 nose piece.
LG24 valve assembly: valve body, U-cup seal and housing, valve seat, ball valve and spring, spring guide and circlip, O-rings.
LG2 inlet swivel: 13 ball bearings, ball plug, seals and back-up rings; 15 mm or 20 mm.
GG5 lever (GG5L with latch), nozzle body 10-1307-715, EK172.1 strainer, GGJ magnet.

Tools and consumables

38 mm adjustable spanner, internal circlip pliers, ball-peen hammer, 3.2 mm drift, screwdrivers, bench vice, 2.5 to 3.0 mm Allen keys, spring clamps, sharp-nose punch, 5 mm drill bit, the special nose piece assembly tool, and Loctite 263. Lubricants: Aeroshell 22 grease on threads and close-fitting parts, Dow Corning Molykote FS3451 fluorosilicone grease on dynamic O-rings, and Nulon L90 anti-seize on rotating parts.

When to reject a part

Distortion or damage on any sealing surface.
Wear marks, scoring or plating damage on swivel bodies.
Damage to the nose piece tail ramp or bridge.
Worn lever slipper faces; worn latch pivot pin or contact points.
Damaged strainer mesh or ring seal.

The manual says age, wear and abuse can make repair uneconomic, and replacing whole assemblies or the nozzle may be the better choice.

Static test (before fitting connector and lever)

Connect to a supply hose with an upstream isolating valve.
Pressurize to 1200 to 1800 kPa (12 to 18 bar, 174 to 260 psi).
Immerse in detergent-loaded water with the nozzle closed.
Apply about 27 N·m (20 ft·lb) bending moment to the inlet swivel while rotating it slowly; watch every joint.
Fit connector and lever; couple to an approved vehicle connector or blanked adaptor. Confirm it locks firmly and the lever and latch work.

Dynamic flow test (with propane)

Connect to a vehicle connector on a dispenser vapor return line with a downstream receiving tank.
With the valve closed, check for vapor leaks with detergent spray.
Pull the lever; spray the connector sides again.
Release the lever; confirm only a small amount of gas escapes.
Close the isolating valve, operate the lever to depressurize, remove the nozzle and refit the connector saddle.

If LPG isn't available, the manual allows bottled nitrogen at an 1800 kPa regulator setting, or compressed air.

Quick answers

At what pressure is a repaired GG20 tested?

The static test in the repair manual uses 1200 to 1800 kPa (12 to 18 bar, 174 to 260 psi) under water, with a 27 N·m bending load on the swivel.

Sources

GG20 Repair & Maintenance Manual (ELAFLEX PACIFIC / L.G. Equipment)