TM 5-3805-294-10
OPERATOR MAINTENANCE
INTRODUCTION - PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
PREVENTIVE MAINTENANCE CHECKS AND SERVICES
NOTE
If the machine has reached the initial 250 hours of operation, contact field level
maintenance to perform the initial 250 hour service.
Tools supplied on the machine are to be used for Preventive Maintenance Checks and
Services (PMCS). Rags are also required for removing dirt and grease.
PMCS intervals should be performed more frequently when operating under unusual
conditions.
Perform PMCS on attachments only if they are to be used for the current mission.
This section contains operator level PMCS requirements for the Hydraulic Excavator (HYEX). The PMCS tables
contain checks and services necessary to ensure that the machine is ready for operation. Maintenance is performed
at specified intervals using the PMCS tables.
Inspecting for good condition is generally a visual inspection to determine if components are safe or serviceable.
Components in good condition are: not bent or twisted, chafed or burned, broken, or cracked. There should be no
signs of wear, fraying, dents, collapsing, tears, cuts, or deterioration.
Damage is any condition that affects safety or prevents a part or assembly from functioning normally or would render
the machine unserviceable for mission requirements.
MAINTENANCE RECORDS AND FORMS
Every mission begins and ends with paperwork. There is not much of it, but it must be kept up. The completed forms
and records have several uses. They are a permanent record of services, repairs, and modifications made to the
machine. They are reports to maintenance personnel, and to the Commander. They serve as a checklist to track
previous machine malfunctions and repair actions. Record results of PMCS on DA Form 2404, Equipment Inspection
and Maintenance Worksheet, or DA Form 5988-E, Equipment Inspection and Maintenance (Electronic) Worksheet.
For the information needed on forms and records, refer to DA PAM 750-8 The Army Maintenance Management
System (TAMMS) Users Manual.
GENERAL MAINTENANCE PROCEDURES
Cleanliness: Dirt, grease, oil, and debris can conceal serious problems. Use solvent cleaning compound
on all metal surfaces and soapy water on rubber or plastic surfaces.
Bolts, Nuts, and Screws: Check for loose bolts, nuts, and screws, as well as for those that are missing,
bent, or broken. Tighten or replace as necessary. If parts cannot be checked with a tool, look for signs of
chipped paint, bare metal, or rust around bolt heads.
Welds: Look for loose or chipped paint, rust, or gaps where parts are welded together. If a damaged weld
is discovered, notify Field Level Maintenance.
Electric Wires and Connectors: Look for cracked or broken insulation, exposed wires, and loose or broken
connectors. Tighten loose connectors and ensure wires are in good shape.
Fluid Hoses, Tubes, and Fittings: Look for wear, damage, or leaks. Ensure clamps and fittings are tight.
Wet spots show leaks, but a stain around a fitting or connector may also indicate a leak. If connectors or
fittings are loose or if hoses, tubes, or fittings are broken or worn out, notify Field Level Maintenance.
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