Fig. 6-28: Determining Capscrew Length; Fig. 6-29: Correctly Installed Capscrew - JLG Lull 1044C-54 II Series Service Manual

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Adding or removing shims from bolted pads may require a different
capscrew length or washer selection.
Boom
Bolted Pad
Nut Insert
Dimension A

Fig. 6-28: Determining Capscrew Length

(Ref. Fig. 6-28) Select a combination of capscrew length, flatwasher (if
needed), and lockwasher (spring and/or star) to obtain the required
dimension (Dimension A). This dimension will ensure that the capscrew
will not protrude past the nut insert and cause boom damage. See
Fig. 6-29. Capscrews that can be purchased from JLG come in three (3)
lengths (3/4", 1", and 1-1/4").
Clearance is measured from under the capscrew head to the lockwasher.
A lockwasher must always be used under the capscrew head.
Apply nonpermanent thread locking compound to the first few threads of
the capscrew before final installation.
Boom
Bolted Pad
Nut Insert

Fig. 6-29: Correctly Installed Capscrew

(Ref. Fig. 6-29) The end of the installed capscrew should be flush with, or
just beneath, the inner edge of the nut insert.
Washer
Lockwasher
Capscrew
Pad Number
39023A
39024A
39530A
39594A
39604A
Bolt
Boom and Transfer
Dimension A
0.28"–0.33"
0.39"–0.44"
0.39"–0.44"
0.39"–0.44"
0.21"–0.26"
J1034
J1034
6-39