Trojan Coupling Hydraulic Override (50MM ONLY)
$346.50
incl. GST
: 5 in stock
: 202663
A galvanised Trojan hydraulic override (surge) coupling for braked trailers up to 2,500kg. It suits 50mm towballs only and comes with a 3/4" master cylinder fitted, ready to connect to your trailer's hydraulic brake line.
Specifications
| Brand | Trojan |
|---|---|
| Part number | 202663 (Trojan T202663) |
| Type | Hydraulic override coupling, snap lock |
| Towball size | 50mm only |
| Maximum capacity | 2,500kg |
| Master cylinder | 3/4" bore, supplied |
| Mounting style | TC40 bolt-on |
| Finish | Galvanised, with anti-rattle screw |
| Standard | Complies with AS4177.3 (1994) |
Measurements
| Mounting holes | 4 x M12 |
|---|---|
| Bolt pattern | 182mm x 54mm, measured across bolt centres |
Compatibility
- Towball: 50mm only. For a 1-7/8" towball, use the 1-7/8" version of this coupling.
- Brakes: trailers with hydraulic brakes. For mechanical (cable) brakes, see the Trojan mechanical override coupling (50mm).
- Weight: up to 2,500kg. Heavier trailers need a braking system the driver controls from the cab; see electric braking systems.
- Drawbar: suits drawbars drilled to the common TC40 182 x 54mm pattern. Measure your existing hole centres before ordering.
What's included
- Trojan hydraulic override coupling (50mm)
- 3/4" master cylinder, fitted
- Anti-rattle screw
Mounting bolts are not listed as included. Trojan sells a matching bolt kit, linked below.
Fitting notes
- Mount with four 12mm high-tensile bolts, as Trojan recommends.
- Tighten to Trojan's recommended torque for the bolt grade:
| Bolt size | Grade 8.8 | Grade 10.9 |
|---|---|---|
| M12 | 100Nm (75ft/lb) | 120Nm (90ft/lb) |
- Check the ball size stamped on your towball before you tow. This coupling will not lock safely onto a 1-7/8" ball.
Related products
- Trojan coupling bolt mounting kit HTC/TC40 (braked)
- Trojan 3/4" master cylinder assembly (replacement)
- Trojan 3/4" master cylinder cap
- Trojan hydraulic override coupling (1-7/8")
- All couplings
Guides: Do I need brakes on my trailer? NZ rules explained · Towball Mount Finder
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