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10B.4 Chain Lock Pin Assembly (Chart 10 item B4)
10B.4.1 Check the bar of the Chain Lock Pin Assembly to make sure it is not bent. If the pin is bent more than 3-32”,
replace the Chain Lock Pin Assembly.
Warranty Note:
Mathey Dearman Inc. will not warranty or accept any responsibility for heating, welding or
straightening of the Chain Lock Pin Assembly.
10B.4.2 Check the area where the Chain Lock Pin joins the washer and chain for cracks. If cracks are found, reweld the
Chain Lock Pin to the washer and chain.
10B.5 Universal Jackbar (Chart 10 item B5)
10B.5.1 Check the Universal Jackbar for cracks. If cracks are found, replace the Universal Jackbar.
10B.5.2 Check the Jackbar surfaces with a straight edge to determine if the Jackbar is bent. If the Jackbar is bent, the
Jackbar should be straightened and checked with some means of non-destructive testing determine if there are
any cracks. If cracks are found, replace the Universal Jackbar.
10B.5.3 Screw the appropriate Thread Gauge from the equipment required list into the threaded hole of the Universal
Jackbar. There should be no more than .010 thousands of an inch of play between Thread Gauge and the threaded
hole in the Jackbar when moved in any direction.
10B.6 Jackscrew (Chart 10 item B6)
10B.6.1 The Jackscrew (Chart 10 item B6) should never be used without the stainless steel swivel pad. If the swivel pad is
missing replace the Jackscrew.
10B.6.2 Check the Jackscrew (Chart 10 item B6) to make sure the tip, that contacts the pipe, will rotate freely without
binding. If the tip will not rotate or is difficult to turn it will mar the pipe. If marring of the pipe or pipe coating is a
concern, replace the Jackscrew.
10B.6.3 Check the Jackscrew (Chart 10 item B6) for galled or missing threads. If the threads are galled or missing threads,
replace the Jackscrew.
10B.6.4 Screw the Jackscrew (Chart 10 item B6) into the Universal Jackbar (Chart 10 item B5). If play between Jackscrew
and the Universal Jackbar (Chart 10 item B5) exceeds .010 of an inch, screw the appropriate Thread Gauge from
the equipment required list) into the threaded hole for and Jackscrew (Chart 10 item B6). If play exceeds .010
thousands of an inch of play between the thread gauge from the required equipment list and threaded hole of the
Jackbar replace the Jackbar. If play is within acceptable limits replace the jackscrew.
10B.6.5 Check the Jackscrew for straightness. A Bent Jackscrew will not function properly and should never be used. If it is
bent, replace the Jackscrew. A bent Jackscrew will not function properly and should never be used. If it is bent,
replace the Jackscrew.
10B.7 Thumbscrew (Chart 10 item B7)
10B.7.1 Check the threads of the Thumbscrew for galled or missing threads. Replace the Thumbscrew, if there are galled
or missing threads,
10B.7.2 Check the Thumbscrew for straightness. If it is bent, replace the Thumbscrew.
10B.7.3 Screw the Thumbscrew into the Main Block (Chart 10 item B-1). If play between Thumbscrew and the threaded
hole in the Main Block (Chart 10 item B1) exceeds .010 of an inch, screw the appropriate Thread Gauge from the
equipment required list) into the threaded hole of the Main Block. If play exceeds .010 thousands of an inch of play
between the thread gauge from the required equipment list and threaded hole of the Main Block replace the Main
Block. If play is within acceptable limits replace the Thumbscrew.
10B.8 Sock Head Cap Screw (Chart 10 item B8)
10B.8.1 Check the Sock Head Cap Screw for galled or missing threads. If there are galled or missing threads, replace the
Sock Head Cap Screw.
10B.8.2 Check the shaft of the Sock Head Cap Screw for straightness. A Bent shaft of the Socket Head Cap Screw will not
allow the Chain Adjustment Mechanism (Chart 10 item B8) to hold the chain under tension. If the shaft of the
Socket Head Cap is bent, replace the Sock Head Cap Screw.
