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MAINTENANCE
PHDHF / PHDHC 03/20
Maintenance Section 5-2
© 2020 Alamo Group Inc.
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Before operating the Post Hole Digger, make sure it is properly lubricated and thoroughly inspected. Only a
minimum of time and effort is required to regularly lubricate and maintain this machine to provide long life and
trouble free operation.
LUBRICATION INFORMATION
The drilling machine must be properly lubricated to achieve the best operation and longest life. Clean excess
grease and hydraulic oil from the drilling machine, especially when operating in sandy conditions.
Each day before use...
Check gearbox for signs of leaking around seals. Occasionally, seals will leak if the unit
sits for a prolonged period of time. However, seals should quit leaking following a short period of operation. If
seals do not quit leaking, replace seals at once and refill gearbox oil.
ONLY USE CLEAN HYDRAULIC OIL
80% of all hydraulic component failures are caused by contamination of the hydraulic oil. Always keep all dirt
and other contaminants from entering the hydraulic system. Always use dust caps and plugs on all quick
disconnects when not in use. Tightly cap all hydraulic openings to hold oil in and to prevent dirt and other
contaminants from entering the hydraulic system. Check condition of the hydraulic oil daily for contamination. If
contamination is present, determine its source and make necessary repairs immediately.
Reduced viscosity of hydraulic fluids occurs at higher operating temperatures and causes a breakdown of fluid
additives such as wear inhibitors. Excessive heat will cause higher internal leakage in the drive unit motor,
resulting in less efficient motor performance. Excessive heat can also result in drive motor seals becoming
brittle and cracked.
INSPECT HYDRAULIC HOSES AND HOSE ASSEMBLIES DAILY
Excessive heat, age and exposure to the weather can cause hose covers to become brittle and to crack.
Replace hoses before failure to prevent loss of hydraulic oil, time consuming “bleeding” of the system, and
hydraulic oil cavitation. Operating faulty hoses increases the chances of personal injury caused by escaping
hydraulic fluid during a hydraulic hose failure.
CHECK DRIVE MOTOR DAILY
The planetary reduction gear has been filled with lubricant by the manufacturer. If oil is observed leaking, the
seal should be inspected for damage or wear and replaced if necessary. Inspect gearbox for any other
damage, which could be causing oil leakage, make required repairs, and refill with lubricant. When
reassembled, fill the PHDHF-Series with 13.5 ounces and the PHDHC-Series with 27 ounces of fresh API-GL-
5 No. 80 or 90 oil.
Summary of Contents for PHDF20-2
Page 4: ...STORAGE 5 3 HYDRAULIC LINES COUPLERS ADAPTERS 5 4 PROPER TORQUE FOR FASTENERS 5 4 ...
Page 5: ...Safety Section 1 1 SAFETY SECTION ...
Page 20: ...SAFETY PHDHF PHDHC 03 20 Safety Section 1 16 2020 Alamo Group Inc SAFETY Decal Description ...
Page 21: ...SAFETY PHDHF PHDHC 03 20 Safety Section 1 17 2020 Alamo Group Inc SAFETY ...
Page 23: ...Introduction Section 2 1 2020 Alamo Group Inc INTRODUCTION SECTION ...
Page 30: ......
Page 31: ...Assembly Section 3 1 ASSEMBLY SECTION ...
Page 35: ...Operation Section 4 1 OPERATION SECTION ...
Page 57: ...Maintenance Section 5 1 MAINTENANCE SECTION ...
Page 61: ...MAINTENANCE PHDHF PHDHC 03 20 Maintenance Section 5 5 2020 Alamo Group Inc MAINTENANCE ...
Page 62: ......