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Courtesy of Hunter Engineering Company –Control Arm Movement Concepts –Inboard shim adjustment –Outboard shim adjustment –Slotted frame / Eccentric cam.

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Presentation on theme: "Courtesy of Hunter Engineering Company –Control Arm Movement Concepts –Inboard shim adjustment –Outboard shim adjustment –Slotted frame / Eccentric cam."— Presentation transcript:

1 Courtesy of Hunter Engineering Company –Control Arm Movement Concepts –Inboard shim adjustment –Outboard shim adjustment –Slotted frame / Eccentric cam –Symmetrical lower arm adjustment –Asymmetrical Upper and Lower control arm adjustment Control Arm Adjustment

2 Courtesy of Hunter Engineering Company Positive Camber Change (Symmetrical Upper Control Arm) u Move front and rear of upper control arm outward equal amounts ê1/16” equals 1/4° ê1/8” equals 1/2° ê1/4” equals 1 degree Front

3 Courtesy of Hunter Engineering Company Negative Camber Change (Symmetrical Upper Control Arm) u Move front and rear of upper control arm inward equal amounts ê1/16” equals 1/4° ê1/8” equals 1/2° ê1/4” equals 1 degree Front

4 Courtesy of Hunter Engineering Company Positive Caster Change (Symmetrical Upper Control Arm) u Move the front of the control arm outward and the rear of the control arm inward equal amounts ê1/32” equals 1/2 degree ê1/16” equals 1 degree ê1/8” equals 2° Front

5 Courtesy of Hunter Engineering Company Negative Caster Change (Symmetrical Upper Control Arm) u Move the front of the control arm inward and the rear of the control arm outward equal amounts ê1/32” equals 1/2° ê1/16” equals 1° ê1/8” equals 2° Front

6 Courtesy of Hunter Engineering Company Positive Camber & Caster (Symmetrical Upper Control Arm) u Move the front of the control arm outward ê1/16” equals 1/2° caster & 1/4° camber ê1/8” equals 1° caster & 1/2° camber Front

7 Courtesy of Hunter Engineering Company Negative Camber & Caster (Symmetrical Upper Control Arm) u Move the front of the control arm inward ê1/16” equals 1/2° caster & 1/4° camber ê1/8” equals 1° caster & 1/2° camber Front

8 Courtesy of Hunter Engineering Company Positive Camber & Negative Caster (Symmetrical Upper Control Arm) u Move the rear of the control arm outward ê1/16” equals 1/2° caster & 1/4° camber ê1/8” equals 1° caster & 1/2° camber Front

9 Courtesy of Hunter Engineering Company Negative Camber & Positive Caster (Symmetrical Upper Control Arm) u Move the rear of the control arm inward ê1/16” equals 1/2° caster & 1/4° camber ê1/8” equals 1° caster & 1/2° camber Menu Front

10 Courtesy of Hunter Engineering Company Inboard Shims Menu Front

11 Courtesy of Hunter Engineering Company Camber Increase u Remove equal thickness shim from front and rear ê1/16” = 1/4° ê1/8” = 1/2° ê1/4” = 1° Remove Remove Shims Front

12 Courtesy of Hunter Engineering Company Camber Decrease u Add equal thickness shim from front and rear ê1/16” = 1/4° ê1/8” = 1/2° ê1/4” = 1° Add Add Shims Front

13 Courtesy of Hunter Engineering Company Caster Increase u Remove shim from front and add to rear ê1/32” = 1/2° ê1/16” = 1° ê1/8” = 2° Move Shims Front

14 Courtesy of Hunter Engineering Company Decrease Caster u Remove shim from rear and add to front ê1/32” = 1/2° ê1/16” = 1° ê1/8” = 2° Move Shims Menu Front

15 Courtesy of Hunter Engineering Company Outboard Shim (symmetrical) u Reverse the shim movement shown for Inboard Shims u All other factors stay the same ê1/16” equals 1/4° camber ê1/16” equals 1/2° caster Menu

16 Courtesy of Hunter Engineering Company Slotted Frame Adjustment u Upper Control Arm u Changes Camber and/or Caster u Methods: –Hit and Miss –Slotted Formula Menu

17 Courtesy of Hunter Engineering Company Eccentric Cam Adjustment u Upper Control Arm u Changes Camber and/or Caster u Methods: –Same as slotted control arm –More controllable Menu

18 Courtesy of Hunter Engineering Company Ford / Lincoln/ Mercury u Eccentric Adjusters for front camber and caster. u Loosen lock nut and rotate large lower nut to adjust angles. Menu

19 Courtesy of Hunter Engineering Company Slotted Control Arm Formula u Reduce specification tolerances to: ê.25° (1/4) camber tolerance ê.50° (1/2) caster tolerance u Lock the service brakes u Level and lock the front sensors u View the front bar graph screen for front camber and caster

20 Courtesy of Hunter Engineering Company Camber and Caster Adjustment u Is the null indicator equal distance from center on both bar graphs? êNO - Requires two moves êYES - Requires one move

21 Courtesy of Hunter Engineering Company Null indicators are not equal u Which end of the control arm must move to make both null indicators move toward the center of their respective graphs? –Camber (+) & Caster (+) - front moves out –Camber (-) & Caster (-) - front moves in –Camber (-) / Caster (+) - rear moves in –Camber (+) / Caster (-) - rear moves out

22 Courtesy of Hunter Engineering Company Null indicators are not equal u Move the control arm until both null indicators are equal distance from the center of their respective graphs.

23 Courtesy of Hunter Engineering Company Null indicators are equal u Move the end of the control arm which will make both null indicators move toward the center of their respective graphs.

24 Courtesy of Hunter Engineering Company Symmetrical Lower Control Arm u Reverse the upper control arm movements u All other factors stay the same ê1/16” equals 1/4° camber ê1/16” equals 1/2° caster Menu

25 Courtesy of Hunter Engineering Company Asymmetrical Control Arm Adjustment u The adjuster furthest from the ball joint will: êhave the greatest effect on caster êhave the least effect on camber Menu

26 Courtesy of Hunter Engineering Company Asymmetric Upper Control Arms GM G20 Van u Add or remove shims equally to change camber u Add or remove shims from the pack furthest from the ball joint to adjust caster

27 Courtesy of Hunter Engineering Company Asymmetrical Lower Control Arm u Rotate the eccentric closest to the ball joint to adjust camber u Rotate the eccentric furthest from the ball joint to adjust caster Menu

28 Courtesy of Hunter Engineering Company Common Adjustments Front Suspension Lower control arm Lower strut Upper Strut plate Ball joint Strut rod Bushing or threaded insert Rear Adjustments Common Rear Adjustments Menu

29 Courtesy of Hunter Engineering Company Slotted Lower Control Arm

30 Courtesy of Hunter Engineering Company Lower Strut Attachment u Lower attachment bolts may permit camber angle adjustment. u Aftermarket kit may be required.

31 Courtesy of Hunter Engineering Company Upper Strut Plate u Camber and/or caster may be adjusted by repositioning the upper strut mount u Aftermarket kit may be required

32 Courtesy of Hunter Engineering Company Ball Joint u A ball joint may be rotated or repositioned to adjust camber and / or caster.

33 Courtesy of Hunter Engineering Company Strut Rod u Loosen one nut and tighten the other to adjust caster u Washers may also be used

34 Courtesy of Hunter Engineering Company Bushing or Threaded Insert u Camber and / or caster may be adjusted by rotating or replacing the insert bushing. Menu

35 Courtesy of Hunter Engineering Company Menu Typical Rear Adjustments Full Contact Shim Eccentric Cam Tie Rod Lower Strut Slotted Control Arm Wedge Strut Rod

36 Courtesy of Hunter Engineering Company Full Contact Shim u Adjust Rear Camber and Toe using full contact shims u Hunter u Northstar u Specialty

37 Courtesy of Hunter Engineering Company Eccentric Cams u Eccentric cams may be used to adjust rear toe and /or camber

38 Courtesy of Hunter Engineering Company Tie Rods u Adjust rear individual toe using tie rod adjustment

39 Courtesy of Hunter Engineering Company Lower Strut u Rear camber may be adjusted by loosening the lower strut retaining bolts and pulling inward or outward

40 Courtesy of Hunter Engineering Company Slotted Control Arm u Rear lower control arms may be slotted to permit toe and camber adjustments

41 Courtesy of Hunter Engineering Company Wedge u A “wedge” be used to adjust rear camber u Wedges may also be used to adjust front camber

42 Courtesy of Hunter Engineering Company Strut Rod u A rear strut rod may be used to adjust individual rear toe

43 Courtesy of Hunter Engineering Company What Are Equipment Manufacturers Doing To Help Technicians Adjust Various Control Arm Configurations Faster And Better? u A vehicle specific software tool has been developed for vehicles with control arms using shims, cams and slots.

44 Courtesy of Hunter Engineering Company How to turn red bar graphs green fast is the problem – adjust with shims

45 Courtesy of Hunter Engineering Company Corvette with symmetrical A arm - shims outboard of frame – actual shim size

46 Courtesy of Hunter Engineering Company Caprice with symmetrical A arm - shims inboard of frame – actual shim size

47 Courtesy of Hunter Engineering Company Chevy C10 with asymmetrical A arm - shims outboard of frame – actual shim size

48 Courtesy of Hunter Engineering Company Chevy C10 with asymmetrical A arm - shims outboard of frame – actual shim size

49 Courtesy of Hunter Engineering Company Technician time saver – adjust one side only to match the other side

50 Courtesy of Hunter Engineering Company How to turn red bar graphs green fast is the problem – adjust with eccentric cams

51 Courtesy of Hunter Engineering Company Dodge B1500 van with eccentric cams - dual bar graphs predict results – steer ahead graph

52 Courtesy of Hunter Engineering Company Technician time saver – adjust one side only to match the other side

53 Courtesy of Hunter Engineering Company How to turn red bar graphs green fast is the problem – adjust with dual slots

54 Courtesy of Hunter Engineering Company Dodge B van with dual slots – dual bar graphs predict results – steer ahead graph Main Menu


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