Points To Note When Tightening A Screw - Canon imageRUNNER ADVANCE 4551i Service Manual

Points to Note when Tightening a Screw

For reduction in weight, thin plates are used in some parts of this machine.
In the case of a screw hole with a triangle mark near it as shown in the figure below, strongly tightening the screw may damage
or deform the screw hole.
In the case of a screw hole with a triangle mark, carefully tighten the screw, taking care not to apply too much force.
The recommended torque value is shown below as a reference value.
Screw (RS tightening)
Fastened member
Tightening M4 Approx. 1.6 Approx. 1.6 Approx. 1.6 Approx. 0.8 Approx. 1.6 Approx. 0.8 Approx. 1.6 Approx. 0.8
torque
M3 Approx. 0.8 Approx. 0.8 Approx. 0.6 Approx. 0.6 Approx. 0.6 Approx. 0.6 Approx. 0.6 Approx. 0.6
(N*m)
* For PCB, refer to the tightening torque value of resin (fastened member).
Metal Resin
RS tight W Sams
Types of screws
W Sems
Metal Resin Metal
Type of Screws
Binding
150
4. Disassembly/Assembly
Binding
Resin Metal
TP
TP
Resin