Valtra A800R Workshop Service Manual

Tables 2, 4 and 6 indicate the reduced tightening torque values to apply to threaded elements in
assemblies with zinc-plated self-locking locknuts, phosphated or zinc-flake-coated nuts or screws, thin
nuts, weldable nuts with a height of less than 0.8 d.
To check these torque values, loosen the threaded element by one quarter turn and then retighten.
These values apply to dry assemblies. If the threads are oiled, reduce the tightening torques.
NOTE:
Read the tensile grade on the screw head and determine the corresponding torque to be applied.
1 - Tightening torque values: zinc dichromate-plated or white zinc-plated metric threads
Nominal
dimension
Tensile grade Tensile grade Tensile grade
ISO 4.6 (SAE 1-BS B) ISO 8.8 (SAE 5-BS S) ISO 10.9 (SAE 8-BS V)
Torque Torque Torque
Min. Max. Min. Max. Min. Max.
M3 0.5 Nm 0.7 Nm 1.3 Nm 1.7 Nm 1.8 Nm 2.4 Nm
M4 1.2 Nm 1.6 Nm 3.1 Nm 4.1 Nm 4.3 Nm 5.7 Nm
M5 2.2 Nm 3 Nm 6 Nm 8 Nm 8.5 Nm 11.5 Nm
M6 4 Nm 5 Nm 10 Nm 14 Nm 14 Nm 20 Nm
M8 9.5 Nm 12.5 Nm 25 Nm 35 Nm 36 Nm 46 Nm
M10 19 Nm 25 Nm 50 Nm 70 Nm 72 Nm 96 Nm
M12 33 Nm 43 Nm 90 Nm 120 Nm 120 Nm 160 Nm
M16 84 Nm 110 Nm 200 Nm 260 Nm 300 Nm 400 Nm
M20 160 Nm 210 Nm 420 Nm 560 Nm 600 Nm 800 Nm
M24 280 Nm 360 Nm 720 Nm 960 Nm 1000 Nm 1300 Nm
M30 540 Nm 720 Nm 1400 Nm 1800 Nm 2100 Nm 2800 Nm
M36 950 Nm 1250 Nm 2500 Nm 3300 Nm 3600 Nm 4800 Nm
2 - Reduced tightening torque values: phosphated or zinc-flake-coated metric threads
Nominal
dimension
Tensile grade Tensile grade Tensile grade
ISO 4.6 (SAE 1-BS B) ISO 8.8 (SAE 5-BS S) ISO 10.9 (SAE 8-BS V)
Torque Torque Torque
Min. Max. Min. Max. Min. Max.
M3 0.4 Nm 0.6 Nm 1 Nm 1.4 Nm 1.5 Nm 1.9 Nm
M4 1 Nm 1.3 Nm 2.5 Nm 3.3 Nm 3.4 Nm 4.6 Nm
M5 1.8 Nm 2.4 Nm 4.8 Nm 6.4 Nm 6.8 Nm 9.2 Nm
M6 3.2 Nm 4 Nm 8 Nm 11 Nm 12 Nm 16 Nm
M8 7.6 Nm 10 Nm 20 Nm 28 Nm 29 Nm 37 Nm
4
1. Introduction
1-17
ACX2831410

Valtra A800R Specifications

General

Brand	Valtra
Model	A800R
Category	Tractor
Language	English