01Chapter II — Hydraulic Systems
How to Increase Hydraulic Pressure in Heavy Equipment
How to increase hydraulic pressure in heavy equipment without replacing the pump. Ray Bowen's field-tested steps for fluid, filters, and relief valves.
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02Chapter II — Hydraulic SystemsCan Hydraulic Pumps Be Rebuilt? What I Learned in 30 Years of Field Service
Can hydraulic pumps be rebuilt? Field engineer Ray Bowen explains when rebuilding saves money, the failure modes worth a rebuild, and repair costs vs new pumps.
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03Chapter II — Hydraulic SystemsTypes of Hydraulic Fluids: What I Learned in 30 Years of Field Service
Types of hydraulic fluids can make or break a $500,000 machine. A retired Cat field engineer explains what to use, what to avoid, safely. Read this first.
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04Chapter II — Hydraulic SystemsHydraulic Pump Seals: Field Guide to Keeping Your Machine's Heart Sealed
Hydraulic pump seals fail in predictable ways. A retired Cat engineer explains how to spot wear, choose replacement seals, and save big on your repairs.
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05Chapter II — Hydraulic SystemsHydraulic Pump Repair Cost: What a Field Engineer Wants You to Know First
Hydraulic pump repair cost ranges from $350 to $6,500. See real price factors, labor rates, and why root cause matters before you approve any pump repair.
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06Chapter II — Hydraulic SystemsMining Equipment Supply Chain Tightness 2026: How to Keep Your Fleet Running
Mining equipment supply chain tightness 2026 is here. A retired Cat field engineer explains what parts are backordered and how to keep your fleet running.
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07Chapter II — Hydraulic SystemsHydraulic Pump Seal Failure: A Field Guide to Stopping the Leak
Hydraulic pump seal failure causes leaks and downtime. Learn how to diagnose, replace, and prevent a hydraulic pump seal failure from a 30-year field engineer.
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08Chapter II — Hydraulic SystemsTypes of Hydraulic Oil: A Field Guide from a Retired Cat Engineer
Learn the types of hydraulic oil used in heavy equipment, from mineral and synthetic to fire-resistant fluids. Field advice from a retired Cat engineer.
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09Chapter II — Hydraulic SystemsOff-Highway Vehicles: Field-Tested Tips for Keeping Your Big Iron Running
Rely on off-highway vehicles day in and out? Ray Bowen shares field-proven maintenance and safety tips for excavators, dozers, and haul trucks. Step up your...
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10Chapter II — Hydraulic SystemsConstruction Site Security News: What Every Heavy Equipment Operator Needs to Know
Construction site security news for heavy equipment operators. Learn from a retired Cat field engineer about theft prevention, security tech, and real-world...
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11Chapter II — Hydraulic SystemsHow to Safely Transport a Scissor Lift and Trailer: Field-Proven Tips from a Retired Engineer
Transporting a scissor lift and trailer requires the right hitch, weight distribution, and tie-downs. Learn field-proven tips from a retired Caterpillar...
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12Chapter II — Hydraulic SystemsYour Loader Parts Source: Field-Tested Advice from a Retired Cat Engineer
Looking for a dependable loader parts source? I spent 30 years fixing heavy equipment. Here's what separates good suppliers from bad ones.