1-20
1. WRENCH, WITH OPENING SLOPING TO THE LEFT, ABOUT TO
BE PLACED ON NUT.
2. WRENCH POSITIONED AND READY TO TIGHTEN NUT. NOTE
THAT SPACE FOR SWINGING THE WRENCH IS LIMITED.
3. WRENCH HAS BEEN MOVED CLOCKWISE TO TIGHTEN THE
NUT AND NOW STRIKES THE CASTING, WHICH PREVENTS
FURTHER MOVEMENT.
4. WRENCH IS REMOVED FROM NUT AND TURNED COUNTER
CLOCKWISE TO BE PLACED ON THE NEXT SET OF FLATS
ON NUT. BUT CORNER OF CASTING PREVENTS WRENCH
FROM FITTING ONTO THE NUT.
5. WRENCH IS BEING TURNED OVER SO THAT WRENCH
OPENING WILL SLOPE TO THE RIGHT.
6. IN THIS POSITION, THE WRENCH WILL FIT THE NEXT TWO
FLATS ON THE NUT.
7. WRENCH NOW IS PULLED CLOCKWISE TO FURTHER
TIGHTEN NUT UNTIL WRENCH AGAIN STRIKES CASTING.
BY REPEATING THE PROCEDURE, THE NUT CAN BE
TURNED UNTIL IT IS TIGHT.
1
2
3
4
5
6
7
ABEf0105
Figure 1-28.—Use of open-end wrench.
