Machine Shop Services

CONTACT US at 800-292-5565 or [email protected]

While Republic Diesel’s specialty is repairing components using the thermal coatings discussed in the spray metalizing section, our general machine department is capable of repairing or making new several types of components. Our shop lathes can swing parts 60 inches in diameter or slightly more than 14 feet in length. Our CNC horizontal boring mill has a 55”x60” rotary table that can travel 98″x70″x47″x19”. Our shop is equipped with several lathes, surfaces, mills, surface grinders, and drill presses. We have our critical measuring tools calibrated to assure the best quality product possible.

Spray Welding

Republic Diesel has been using the Thermal Coating process to repair engine components, transmission, torque and brake components for several years. This repair process is authorized by many manufacturers to repair various components. The two primary processes we use are the thermal spray arc system and the powder flame spray process. We successfully repair components that range from a couple of inches in diameter up to 60 inches in diameter. We have applied the thermal coating to spindles and hubs in large earth moving equipment as well as repairing a seal surface of a bearing race diameter on small splined shafts.

  • Cylinder block restoration
  • Main caps spray-welded to restore interference fit
  • Main saddles spray welded to repair damaged bores
  • Crankshaft seal areas
  • Big bore end on connecting rod
  • Driveline yoke seal area

Internal transmission and torque components including:

  • Brake Anchors
  • Brake Pistons
  • Aluminum Torque Converter-Impellors
  • Stators
  • Turbines
  • Yokes
  • Steering Clutch Pistons

Spray Weld Preparations

  • Preparing and masking
  • Spray weld repair
  • Applied repair before resurface
  • Resurfaced decks

Cylinder Heads

Whether you have blown a head gasket and want to check the head before reinstalling or want to totally rebuild the head to O.E.M. specs we have you covered!

  • Resurfacing
  • Injector tube replacement
  • (Including Cummins ISX engine)
  • Pre-combustion chambers repaired
  • Magnetic particle inspection
  • Pressure test capabilities to find cracks/leaks
  • Valve seat and valve guides replaced as necessary
  • Re-machine fire ring grooves
  • Valve seat angles cut with 3 angle inserts in the same setup
  • Resurface exhaust ports
  • Crack repair
  • Remove and install cam bearings on overhead cam engines
  • Repair cam bearing bores on overhead cam cylinder heads
  • We also offer an extensive line of rebuilt heads ready to go!

Cylinder Block Repair

  • Complete and thorough checkout including magnetic particle inspection and pressure testing
  • All critical dimensions measured, recorded, and compared to OEM specifications, repairs estimated accordingly
  • Fabricate and install brass water passage repairs to repair erosion of the parent metal
  • Spray welding of deck surfaces worn below minimum height requirements
  • Deck resurfacing done with inserts to meet OEM surface finish criteria on numerically controlled Rottler mill machine
  • Cylinders bored from 2” to 24” diameters
  • Resurfacing capabilities up to 104” in length
  • Cylinder blocks resurfaced and bored in the same setup
  • Additional repairs include installing upper and lower bushings, lifter bore and cam bore repairs, and align bore

Crankshafts and Camshafts

  • Magnaflux Inspections for Crack Detection
  • Wet magnetic particle inspection
  • Inspect for hardness and straightness
  • Polish and grind crankshafts
  • Indexing and stroke equalizing
  • Plugs removed and oil galleys cleaned
  • Seal areas repaired by spray welding
  • Profilometer – surface finish gauge
  • Snout repair, machine keyway, and gear installation capabilities
  • Remanufactured crankshafts exchanged and sold

Connecting Rods

  • Complete Recondition
  • Replace pin bushings
  • Magnetic particle inspection
  • Recondition rod housing bore
  • Spray weld rod housing bore
  • Internally grind rod housing bore
  • Check center to center, bend, and twist
  • Replace pin bushings