Marcus Delray·Heavy Equipment Rebuild Specialist·17 Years in the Trade
Final Drive Rebuilds
Planetary gear sets · Travel motors · Sprocket carriers
Cat 390F · Final Drive · Part #385-9504
Komatsu PC490 · Boom Cylinder · Reseal
Volvo EC480 · Swing Reduction · Bearing Pack
Deere 870G · Final Drive · Post-Rebuild
He pulled the planetary on our Cat 390 in under six hours. Dealer said three weeks. We were back in the cut next morning.
Hours Avg. Hydraulic Reseal
Boom cylinders · Stick cylinders · Bucket cylinders
Machine arrives or is assessed on-site. Symptoms mapped to hydraulic schematic — no guesswork, no parts-cannon approach.
Full disassembly in a clean-room environment. Every component measured against OEM tolerance, not approximation.
Precision reassembly with new seals, bearings, and wear components. Torqued to spec — not "close enough."
Pressure-cycled and load-tested before the housing is sealed. You get a written test report with every job.
312
Cylinders
Resealed
99.1%
Pass Rate
First Test
0
Comebacks
This Year
Cat · Komatsu
Deere · Volvo
Dragged out of the mud, rebuilt tougher
Final drive seized on a 100-ton excavator mid-cut. Trailer recovery, full planetary teardown, new bearing races and sun gears. Back on the job in 18 hours.
18 hrs
Total Job Time
Full bevel gear set replacement
Both final drives and bevel gear set — complete powertrain teardown. Every bearing measured before replacement.
31 hrs
Powertrain Total
Main pump & control valve overhaul
Dual main pump rebuild + control valve reseal. Pressure-tested to 5,000 PSI before reinstall.
9.5 hrs
Pump + Valve
Complete undercarriage strip and rebuild
Track frames, idlers, rollers, sprockets, and travel motors — full undercarriage overhaul on a 90-ton Liebherr. Measured 94% wear on entry, left at factory clearance.
41 hrs
Full Undercarriage
Skip the diagnosis runaround. Tell me the machine, the system, and what it's doing — I'll know what it needs before you finish the sentence.
(505) 555-0178
Call Direct · Available 6AM – 9PM
