Rig Parts & Components

Proportioner pumps take the hardest daily beating on the rig — constant cycling under pressure, temperature swings, and whatever wear the chemical stream itself introduces over thousands of cycles. Packing sets, check valves, and piston/rod seal kits are the parts that fail first, and having the right rebuild kit on hand turns a pump rebuild into a same-day shop job instead of a week waiting on a factory-direct order.

Repair and rebuild kits here are scoped to the drive systems actually running on Canadian rigs: Graco Reactor 2 (E-XP2 and E-30 Elite), PMC, and Gusmer H-20/H-35 pump assemblies. Electric-drive and hydraulic-drive pump internals aren't interchangeable, so kits are sold by drive type and pump model, not as a universal fit.

If a rig is showing off-ratio spraying, pressure that won't hold steady, or a pump that's cycling faster than normal for the same output, that's usually a packing or check-valve problem before it's a proportioner-level electronics issue — the rebuild kit is often the fix, not a full pump swap.

Timing matters as much as part selection. A pump rebuilt on a scheduled interval, before packing wear shows up as an actual ratio problem, is a controlled shop job a tech can plan around. The same rebuild done reactively, after a rig has already gone off-ratio on a live job, means lost material, a callback risk on the finished spray, and a rush order instead of a routine one. Contractors running consistent annual hours on a rig generally do better tracking pump cycles or calendar intervals and ordering the rebuild kit ahead of the failure rather than after it.

It's also worth confirming pump drive type before ordering — electric-drive Reactor 2 packages and hydraulic-drive PMC or Gusmer setups use different seal geometries even where outward specs look similar, and a kit ordered off the wrong drive assumption won't fit on arrival.

Heated hose failure mid-job is one of the fastest ways to lose an entire day — the bundle carries chemical, air, and the heating/temperature-sensor circuit all in one jacket, and a break in any one of those runs shuts the whole gun down. Repair components here cover jacket sections sized to common bundle lengths, connector and coupler hardware, and temperature sensor leads, so a field repair can splice in a working section rather than waiting on a full replacement hose.

Generator parts round out the list because a rig's proportioner, gun heat, and hose heat all draw off the same onboard generator — a generator problem takes the whole rig down, not just one system. We stock filters, belts, spark plugs and injector components, and voltage regulators sized to the diesel (21-60kW) and gas (18-22kW) units typically mounted on Canadian rigs, matched to total system wattage plus the standard 15% headroom these setups are sized to.

For both hose and generator parts, having the connector style and generator model on hand before you call saves a round of back-and-forth — bundle lengths and fitting styles vary enough between builds that a quick model check up front gets the right part shipped on the first try.

Generator wear parts follow a fairly predictable schedule tied to run hours rather than calendar time, which makes them easier to plan around than a sudden hose failure. Filters and belts on a diesel unit running daily through a busy season wear faster than the same components on a generator used a few days a week, so tracking actual run hours (not just months in service) gives a more accurate picture of when a filter or belt swap is due. Spark plug and injector wear on gas units follows a similar hours-based pattern.

Electrical components on both the generator and the hose heating circuit need to meet CSA certification for use in Canada — this isn't optional paperwork, it's a real safety requirement on components carrying line voltage in a mobile rig environment. Parts sourced here for generator voltage regulators and heated hose electrical connectors are CSA-compliant, which matters both for crew safety and for staying on the right side of provincial electrical inspection requirements if your rig is ever checked.

A down rig costs more in lost billable days than almost any part costs outright, which is why rush shipping is built into how this page works rather than an upsell option. Core wear parts — gun tips, mix chambers, O-ring kits, and the more common pump seal kits — are the ones most likely to be in stock and ready to move same-day or next-day.

For less common parts, like a specific generator voltage regulator or a longer heated hose repair section, tell us the rig's brand and model along with what's failed and we'll give you a straight answer on lead time before you order — not a vague 'ships soon' with no timeline attached.

If the part in question is tied to a larger repair — a pump that needs more than a rebuild kit, or a hose failure that's really a heating-circuit fault — that's a service call, not a parts order. See Rig Service, Repair & Maintenance for diagnosis and field/shop repair, or call and we'll sort out which side of the line the problem is on.

The contractors who lose the least time to parts problems are usually the ones who keep a small buffer stock in the shop: a spare gun tip and mix chamber matched to the active proportioner, one pump seal kit, and a couple of generator filters. None of that is a big spend relative to a single lost billable day, and it turns most common failures into a shop-floor fix instead of a shipping wait.

If you're running more than one rig, or running mixed brands across a small fleet, standardizing spare parts stock by proportioner model avoids the situation where a tech has three drawers of near-miss parts and none that actually fit the rig in front of them. Tell us your fleet's proportioner models and we can help put together a stocking list scoped to what you actually run.