67
Frame
Product Support: www.instron.com
Adjustable crosshead
Inspect the adjustable crosshead
Operation of the adjustable crosshead should be checked at the frequency stated in the “Preventative
maintenance schedule” on page 61. To check operation, use the adjustable crosshead controls to
operate the adjustable crosshead through its entire range of motion. Check for binding and abnormal
noise. The crosshead should move smoothly. If you notice any problems resulting from this inspection,
contact your local Instron Services department as directed on page 20 for immediate assistance.
Lubricate the adjustable crosshead
The backlash eliminator assemblies, screw columns and adjustable crosshead drive chain must be
lubricated at the frequency stated in the “Preventative maintenance schedule” on page 61. Proper
lubrication prevents wear and promotes good operation of these components. Each frame is equipped
with one or more backlash eliminator assemblies and screw columns. 300DX frames have one backlash
eliminator assembly and one screw column. 600DX frames have two backlash eliminator assemblies
and two screw columns. The assemblies are located in the base of the frame. The backlash eliminator
assemblies have nipple-style grease fittings for easy lubrication. All threads of the screw columns must
have a coating of grease at all times. The drive chain is located in the base of the frame.
Equipment and supplies required
• A nipple-style grease gun - Either a hand operated or pneumatic grease gun can be used. For frames
with G7-style crossheads, DO NOT use the grease gun that is supplied for lubrication of the grip
assemblies.
• A 5 mm hex key (supplied)
• Solvent or diesel fuel - Only needed to clean the grease from the screw columns if the existing grease
on the screw columns has dried to a paste
• A paint brush
• Clean towels, rags, or similar
• Appropriate lubricants - refer to Table 15 for recommended greases - equivalent greases can be
substituted
All equipment and supplies must be supplied by the customer unless noted as “supplied”. For a list of
equipment that was supplied with the system, refer to “Ancillary parts” on page 87.
Table 15. Recommended lubricants for adjustable crosshead components.
Location Recommended Lubricant
Backlash Eliminators (grease
fittings)
Screw Columns
• Dow Corning, Molykote BR2 Plus
1
• Chevron, Delo Heavy Duty Moly 3% EP2
• Allegheny Petroleum, Altra LCM EP#2
Note: Other suitable greases can be used. A suitable grease is any multipurpose
extreme pressure NLGI grade #2 lithium complex grease with 3% Molybdenum
Disulfide.
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