A hydraulic hose assembly is only as good as the specification behind it. For a mixed or modified fleet, an old hose needs to be checked against the current machine and circuit before it is used as the reference. RHPL builds every assembly connection to connection: hose class, end A, end B, overall length, orientation between the two ends, protective sleeve and tag wording are confirmed in writing before any hose is cut.
What we build
- Single assemblies and repeat batches for planned maintenance and rebuilds.
- Assemblies for steering, hoist, swing, travel, pilot and lubrication circuits on mobile machines.
- Plant assemblies for roller presses, kiln drives, furnace hydraulics, crushers and power packs.
- Assemblies grouped into machine-wise tagged kits, where every position has its own tag.
Hose classes run from R1 and R2 braided hose to 4SP, 4SH, R13 and R15 spiral hose, plus thermoplastic hose for lubrication and low-volume lines. The hose maker and series are named in the quotation so that your engineer can check the datasheet.
Resolving fitting identity before we quote
South African fleets mix British, American, European and Asian machines, so the same-looking nut can be one of five thread families. An unconfirmed fitting identity can result in an assembly that cannot be fitted. Before quoting, we work through these checks with you:
- Sealing method first. Is it a cone, a flat face with an O-ring, a 37° flare, a 24° metric cone, a flange or a staple-lock socket? A square-on photo of the sealing face helps the technical review.
- Thread measurement second. Outside diameter of a male thread or inside diameter of a female thread, plus threads per inch or pitch. BSP and JIC can look alike at a glance; a thread gauge settles it.
- Seat angle and O-ring. A 60° BSP cone and a 37° JIC flare will not seal on each other even when the nut threads on.
- Orientation. For two bent ends, the angle between them, measured looking down the hose, is recorded in degrees.
- Length. Overall length is measured end to end, including fittings, with the hose laid straight.
When a sample cannot be sent, the enquiry form accepts photos and drawings up to 5 MB. Where a fitting cannot be identified with confidence, we say so and ask for more information rather than quote a guess.
Where assemblies fail in South African duty
- Ore and coal dust. Northern Cape fines and Highveld coal dust wear through covers where hoses rub on frames or each other. We recommend abrasion-resistant covers and spiral or textile sleeves at rub points.
- Impulse fatigue on long haul cycles. Hoist and steering circuits on large rigid trucks see repeated pressure peaks. Where the circuit requires it, we specify 4SH, R13 or R15 class hose rather than a lighter series that only matches the nominal pressure.
- Underground crush and bend. On low-profile LHDs and bolters, tight routing kills hoses at the ferrule. Correct length, elbow orientation, hose grade and the full circuit specification all need to be satisfied. See TMM kits.
- Heat near furnaces and kilns. Ferroalloy and cement plants need sleeves and careful routing. See steel and ferroalloy smelters.
- Cold start-ups. Winter mornings on the Highveld stiffen hose. We confirm the low-temperature rating of the hose series for exposed machines.
Machine and circuit details for a South African requirement
Buyers can submit requirements for machines such as ultra-class rigid haul trucks, hydraulic face shovels, dozers, graders, blast-hole drills, articulated dump trucks, underground loaders, drill rigs, roof bolters and utility vehicles, from makers such as Caterpillar, Komatsu, Bell, Hitachi, Liebherr, Volvo, Sandvik and Epiroc. Machine names describe the application only.
*Aftermarket assemblies built to the confirmed reference. Not OEM-genuine parts; no OEM approval is claimed.*
How each assembly is made and documented
Fittings are selected or CNC-made to match, hose is cut square and cleaned, and the assembly is crimped on Finn-Power machines to the fitting maker's crimp data. Every assembly is pressure-tested and carries a traceable RHPL tag; pressure-test records for the supplied assemblies go with the packing documents. Ends are capped so that South African dust does not enter before fitting.
Receiving the assemblies
The packing list groups assemblies by machine or position and repeats each tag number, so your stores team can check the delivery against the original list line by line. Keep the tag on the hose after fitting: it is how a repeat order is placed later.