Allied Hydraulic provides professional hydraulic repair services for Caterpillar construction and industrial equipment. We specialize in repairing and rebuilding Caterpillar hydraulic cylinders, along with servicing the OEM hydraulic components commonly used in CAT machines. Our goal is to restore performance, reliability, and service life while minimizing downtime in the field.
Allied Hydraulic provides expert hydraulic repair and rebuild services for Caterpillar construction and industrial equipment.
Our team supports a wide range of CAT machines and hydraulic cylinders, along with the Original Equipment Manufacturer (OEM) hydraulic pumps, motors, and valves commonly used in Caterpillar systems.
All repairs are performed to meet or exceed OEM specifications, with full testing to ensure reliable performance in demanding jobsite conditions.
Allied Hydraulic services hydraulic cylinders used in a wide range of Caterpillar equipment. Common machine types include the following.
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415, 415 IL, 416, 420, 420 XE, 430, 440, 450, 428, 432, 434
D1, D2, D3, D4, D5, D6, D6 XE, D7, D8, D9, D10, D10T2, D11, D11 CD, 814 (US EPA Tier 4 Final and Tier 2 equivalent models)
300, 300D, 300D VPS, HPU300, 301.5, 301.7 CR, 301.8, 302 CR, 302.7 CR, 303 CR, 303.5 CR, 304, 305 CR, 306 CR, 307.5, 308 CR, 308 CR VAB
538, 548, 558, 568
6015, 6020B, 6030, 6040, 6060
MH3022, MH3024, MH3026, MH3040, MH3050, MH3250, MH3260
120 GC, 120 AWD, 140, 140 AWD, 140 AWD LVR, 140 GC, 140 GC AWD, 150, 150 AWD, 160, 160 AWD, 14, 16, 18, 24
903D, 906, 907, 908, 910, 914, 920, 926M, 926M Aggregate Handler, 930M, 930M Aggregate Handler, 930M Ag Handler, 930M Waste Handler, 938M, 938M Aggregate Handler
Allied Hydraulic provides complete repair and rebuild services for Caterpillar hydraulic cylinders used in construction, mining, forestry, and material handling equipment. Our technicians restore cylinders to OEM specifications through precision machining, high quality seal replacement, and thorough pressure testing. From standard maintenance repairs to complex damage, we focus on extending service life and reducing unplanned downtime.
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Caterpillar 345C / 345C L / 345C LC
1803801500
Caterpillar 365C L
1803801500
Caterpillar 385C MH
1803801500
Caterpillar GSH15B
1178884235, 1233845847
Caterpillar GSH20
1178884235, 1230413063
Caterpillar GSH20B
1178884235, 1233855728
Caterpillar GSH22
1178884235, 1231818375
Caterpillar GSH22B
1178884235, 1234559706
Caterpillar GSH9
1178884235, 1229640362
Caterpillar GSH9B
1232764677, 1178884235
Cylinder Application
Models
Caterpillar 345C / 345C L / 345C LC
1803801500
Caterpillar 365C L
1803801500
Caterpillar 385C MH
1803801500
Caterpillar GSH15B
1178884235, 1233845847
Caterpillar GSH20
1178884235, 1230413063
Caterpillar GSH20B
1178884235, 1233855728
Caterpillar GSH22
1178884235, 1231818375
Caterpillar GSH22B
1178884235, 1234559706
Caterpillar GSH9
1178884235, 1229640362
Caterpillar GSH9B
1232764677, 1178884235
Caterpillar hydraulic cylinders operate in harsh environments and are subject to wear over time. Allied Hydraulic commonly repairs the following issues.
Hydraulic oil leaks caused by worn or damaged seals
Scored or pitted cylinder rods
Bent rods resulting from heavy loading
Internal barrel damage and scoring
Excessive wear at pin mounts and attachment points
All repairs are tested to verify sealing, performance, and operational reliability before returning to service.
While Caterpillar equipment is branded under CAT, many hydraulic systems rely on OEM manufactured components. Allied Hydraulic services these components when used in Caterpillar applications.
CAT construction equipment commonly uses axial piston and gear pumps manufactured by OEM suppliers such as Bosch Rexroth, Kawasaki, and Danfoss. Allied Hydraulic repairs and rebuilds these pump types when used in Caterpillar systems.
Swing motors, travel motors, and auxiliary motors used in CAT equipment are typically supplied by OEM manufacturers including Rexroth and Eaton Char-Lynn. Allied Hydraulic services these motors to restore performance and reliability.
Directional control valves, main control valves, and auxiliary valves used in Caterpillar equipment are commonly sourced from OEM valve manufacturers such as Danfoss. Allied Hydraulic provides repair and rebuild services for these valve assemblies.
Caterpillar hydraulic cylinders can fail due to worn seals, rod surface damage, internal contamination, corrosion, or excessive side loads. These issues often show up as leaks, loss of holding force, or slow cylinder response. Allied Hydraulic diagnoses the root cause and rebuilds cylinders to restore proper performance.
If a cylinder is leaking internally or externally, has bent rods, or exhibits inconsistent movement or pressure loss, it likely needs repair. Allied Hydraulic can inspect the cylinder and advise whether a rebuild will restore function or if replacement is required.
Yes. Allied Hydraulic services hydraulic cylinders, pumps, motors, and valves used across a wide range of Caterpillar equipment, including excavators, loaders, dozers, graders, and mining machines. We handle both current production and legacy models.
Absolutely. All repaired Caterpillar hydraulic cylinders and components are tested for pressure, sealing, and smooth operation before they are returned to you to ensure reliability in the field.
We’re looking forward to helping you. Whether you have questions about products or services, our team is ready to help you KICK@$$
