20
Detailed Inspection and Maintenance
Inspection or Maintenance Item
Forks
Notes
Lubricate parking brake
Lowered
Lubricate with “Slick 50 One Lube” or equivalent
Outrigger pivots and linkage components
Raised*
Ensure all pins and retaining rings are in place and secure
Outrigger linkage
Raised*
Ensure linkage over-centers and locks
Mast channels
Lowered
Smooth, free of fi lings and lightly lubricated
Sling wheel / sling wheel bracket
Lowered
All pins and retaining rings in place
Sling
Lowered
Good condition - no tears or excessive wear
Transition switch and switch bracket
Lowered
Good condition and bracket secure
Upper cylinder area
Lowered
Return line in place - no fl uid leakage
Lower cylinder area
Raised
Hydraulic line and fi ttings secure - no leakage
Constant force spring
Raised
Clean and free of debris
Battery terminals
Lowered
Clean and tight
Hydraulic Oil
Lowered
Oil level and appearance
Handle gas spring
Lowered
Handle returns properly
Lever arm cam followers
Raised
Grease cam followers
* See Figure 33
Chart 3 Detailed Inspection and Maintenance
Detailed Maintenance (Every 2 years or 5000 lift cycles)
Bishamon recommends that several items be replaced every two (2) years or every fi ve thousand (5000) lift cycles. Replacement of these
components will ensure the UniLift continues to operate in a safe, reliable manner. Instructions for the following maintenance items are outside
the scope of the manual. However, detailed instructions are available from your local Bishamon dealer or Bishamon Industries Corporation. The
following maintenance operations must be performed by a qualifi ed service person.
Hydraulic Oil
Bishamon recommends the hydraulic oil be replaced every twentyfour (24) months of service or more often if conditions warrant. The frequency
of oil changes will depend upon the general working conditions, severity of use and the overall cleanliness and care given to the UniLift. Unless
otherwise specifi ed, all UniLifts are supplied with Mobil DTE 21 hydraulic oil.
Fluid Type
Manufacturer
Fluid Temperature Range °F
DTE 21
MOBIL
0 - +150
DTE LIGHT
MOBIL
+40 - +150
DTE 13
MOBIL
0 - +160
SAE 10
PENNZOIL, MOBIL, ETC
0 - +150
SAE 10W30
PENNZOIL, MOBIL, ETC
+20 - +170
SAE 20
PENNZOIL, MOBIL, ETC
+30 - +170
MIL 5606
PENNZOIL, MOBIL, ETC
-30 - +75
Chart 4 Recommended Hydraulic Fluids
Sling and Constant Force Spring
Bishamon recommends replacing the sling and constant force spring every two (2) years or fi ve thousand (5000) cycles. Both require removal of
the fork carriage assembly. While not complicated, this should not be attempted without a thorough understanding of the fork carriage removal and
installation procedures. Contact your local Bishamon dealer or Bishamon Industries Corporation for additional instructions.
Mast Rollers
Bishamon recommends inspecting and lubricating the mast roller needle bearings every two (2) years or fi ve thousand (5000) cycles. Thoroughly
clean the mast roller needle bearings, bearing races and thrust washers with an industrial solvent. Lubricate each needle bearing with a general
purpose EP grease.
