Alltrux Slack Adjusters

AUTOMATIC SLACK ADJUSTERS

Brake Drag Issues:

During prolonged braking, it is normal for the drum to increase the chamber stroke by as much as ¼" due to drum expansion caused by elevated heat. During this event, the [slacks] rate of adjustment is critical in helping reduce the risk of over-adjustment and brake drag. If the [slack] adjusts aggressively to overcome or eliminate this temporary lining to drum gap, when the brake drum cools and moves back to its normal size you will be guaranteed a bad case of brake drag.

Example 1:

The chart shows the GUNITE [slack] takes 12 brake applications to Alltrux 23 brake applications to overcome the same ¼" gap.

Result: The Alltrux style (slack) adjusts more gradually reducing the likelihood of brake drag.

Example 2:

The chart shows the BENDIX [slack] takes 35 brake applications to Alltrux 34 brake applications to overcome the same ¼" gap.

Result: The Alltrux style (slack) adjusts virtually the same as the Bendix OE brand.

Adjustment Rate

Every Alltrux (slack) is tested in the USA to meet SAE J1462 requirements.

ALL MAKES. ALL PARTS. ALLTRUX ALLTRUX.COM | (844) ALLTRUX

MORE brake applications, designed to provide a MORE gradual adjustment rate significantly reduces the risk of brake drag.

Original Equipment Brand Drum Expansion # of Orig Equip Brake Apps # of Alltrux Brake Apps Orig Equip Lining to Drum Clearance Alltrux Lining to Drum Clearance Bendix_Versajust ¼" 35 34 0.014 0.013 Gunite_2000 ¼” 12 23 0.014 0.012 Meritor ¼” 14 22 0.012 0.012 Haldex_S-ABA ¼” 23 23 0.009 0.012 OE vs. Alltrux Brake

Haldex S-ABA

Gear Set / Integrity:

SAE J1462 Section 9.2-9.3 is the testing procedure used for evaluating gear-set integrity of a brake adjuster. Note: Each OE brand (slack) has been tested to establish the baseline data necessary to provide comparative data analysis.

The charts at right illustrate the precision and consistency of each Alltrux style (slack) when compared to the equivalent OE brand (slack) gear-set torque values. (OE/Blue and Alltrux/Red brand gear-set integrity torque results.

SAE J1462)

Lining to Drum Clearance

The precision of the gear set defines the increment of adjustment and consistency. Any deviation in the adjustment rate will create irregularities in the Lining to Drum Clearance.

Any clearance irregularities will promote excessive lining wear and may increase vehicle stopping distances.

Bendix Versajust

ALL MAKES. ALL PARTS. ALLTRUX ALLTRUX.COM | (844) ALLTRUX AUTOMATIC SLACK ADJUSTERS

35.0 30.0 25.0 20.0 15.0 10.0 5.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 180 DATA POINTS PER SECOND TORQUE (FT-LB) ALLTRUX MAX: 29.2 OEM MAX: 28.4 HALDEX

VS. ALLTRUX EQUIVALENT ASA: GEAT SET INTEGRITY / TORQUE TEST HALDEX OEM ALLTRUX

OEM (P/N: 40020212)

40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 180 DATA POINTS PER SECOND TORQUE (FT-LB) GUNITE OEM (P/N: 1172) VS. ALLTRUX EQUIVALENT ASA: GEAT SET INTEGRITY / TORQUE TEST GUNITE OEM ALLTRUX Gunite 2000 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 ALLTRUX MAX: 37.0 OEM MAX: 36.5 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 180 DATA POINTS PER SECOND TORQUE (FT-LB) BENDIX OEM (P/N: K043197) VS. ALLTRUX EQUIVALENT ASA: GEAT SET INTEGRITY / TORQUE TEST BENDIX OEM ALLTRUX

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99 101 103 105 107 109 111 113 115 117 119 121 123 125 127 129 131 133 135 137 OEM MAX: 31.2 ALLTRUX MAX: 32.2

Every Alltrux (slack) is tested in the USA to meet SAE J1462 requirements.

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