B32.20-0107-09
1 | Bellows of the pneumatic lifter (assembly supplied in a single piece) | 10 | Top self-locking nuts fastening the pneumatic lifter's "U" bolts | |
2 | Bottom cross member brackets of the pneumatic lifter bellows (fastened to the side rails) | 11 | Pneumatic lifter's "U" bolts | |
2.1 | Bottom cross member of the lifter's pneumatic bellows | 12 | Vehicle side rails | |
3 | Top bracket of the lifter's pneumatic bellows | 13 | Pneumatic connection | |
4 | 3rd auxiliary axle | 14 | (Arrow indicating vehicle front) | |
5 | Self-locking nuts | |||
6 | Fastening bolts of the lifter bellows bottom cross member | A | Rear view of the 3rd auxiliary axle lifter in raised condition (pressurized) | |
7 | Flat washers (one under the bolt's head and another one under the nut) | B | 3rd auxiliary axle lifter lowered (unpressurized) in the rolling position. Left side view | |
8 | Bottom fastening and adjusting nuts of the pneumatic lifter's "U" bolts | C | Adjusting measurement between the lifting "U" bolts and the lowered auxiliary axle (lifter unpressurized) | |
9 | Fastening nuts of the pneumatic lifter's bellows |
| Remove | ||
1 | Fully lower the 3rd auxiliary axle | To remove the 3rd auxiliary axle lifting assembly the vehicle must be completely unladen | |
The most appropriate place to remove and install the lifting assembly of the 3rd auxiliary axle is on a service pit, if possible fitted with a lifting system. | |||
Some care to be taken in case of need to lift the vehicle | |||
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Risk of serious accidents. | |||
2 | Disconnect the negative battery cable or turn off the main switch | Detach the battery negative lead releasing its end fastened to the chassis frame. Avoid detaching the negative lead end attached to the battery pole. | |
On vehicles with electronic engine management, observe the recommendations to detach the battery cables. | |||
3 | Detach the air piping from the pneumatic connection (13) | Plug the pneumatic connection of the lifting assembly with a suitable plug to avoid dust getting in the lifter. | |
4 | Remove the fastening nuts (9) of the pneumatic lifter's bellows (1) | ||
5 | Remove the top self-locking nuts (10) from the "U" bolts (11) of the pneumatic lifter | ||
6 | Remove the pneumatic filter "U" bolts (11) | If the pneumatic lifter "U" bolts (11) and the bottom nuts (8) are in good condition and will be reused, do not change the position of the nuts, as they will the base to adjust measurement “C” between the "U" bolts and the beam of the 3rd auxiliary axle. | |
7 | Remove the top bracket of the pneumatic lifter bellows (3) | ||
8 | If it is necessary to remove the lower cross member supports (2): Loosen and remove the self-locking nuts (5), the flat washers (7) and the fastening screws of the lower cross member of the suspension bellows (6) | ||
| Clean | ||
9 | Clean all the components | If re-utilizing the pneumatic lifter bellows (1), dry clean it without utilizing any liquid or cleaning solvent. | |
| Check | ||
10 | Check the components condition | Check the thread of the bolts, of the "U" bolts and, of the studs of the pneumatic lifter's bellows in case re-utilizing it | |
Installation: For safety measure, replace the self-locking nuts (5). | |||
| Install | ||
11 | Install the bottom cross member of the pneumatic lifter bellows (2) and fasten it to the brackets (2) with the bolts (6), the plain washers (7) and the new self-locking flange nuts (5). | Assemble the bottom cross member fastening bolts (2.1) from top to bottom with two plain washers, one at the bolts head and another one at the nuts and, tighten the self-locking nuts (5) to the specified torque. | |
Vehicle 693.127, 695.301/304Flanged nuts of the cross member attachment bolts on the longitudinal members | |||
Vehicle 693.193/194Flange nuts of the bolts attaching the pneumatic lifter cross member to the side rails | |||
12 | Install the pneumatic lifter bellows (1) fitting it in the bottom cross member (2.1) and install the nuts (9) on the studs without tightening them | ||
13 | Install the bellows top bracket (3) and install the bellows fastening nuts (9) on the studs without tightening them | ||
14 | In case of using new U-bolts: Install the lower nuts for fixing and adjusting the pneumatic lifter U-bolts (8) in the suspension clamps (11) and screw them in so that a clearance corresponding to measure "C" is obtained between the auxiliary shaft tube and the clamps | In the case of re-utilizing the previously removed "U" bolts, as indicated at step 6 of the removal instructions, the bottom nuts will already be at the adjusting point. | |
Vehicle 693.127, 695.301/304Maximum C play required between the lifting clip and the 3rd auxiliary axle's beam | |||
Vehicle 693.193/194Maximum C play required between the lifting clip and the 3rd auxiliary axle's beam | |||
15 | Install the pneumatic lifter "U" bolts (11) and fasten them with the self-locking nuts (10) without applying the final tightening | Center the pneumatic assembly and the "U" bolts so they are not under tension (forced) | |
16 | Normally tighten the pneumatic lifter bellows nuts (9) on the top and bottom studs of the pneumatic lifter bellows (1) | Installation: | |
Adjust the clearance between the lifter's "U" bolts and the beam of the 3rd auxiliary axle | |||
17 | Check and, if necessary, adjust the clearance “C” between the two "U" bolts of the pneumatic lifter and the beam of the 3rd auxiliary axle | The specified clearance “C” must be obtained with the vehicle totally unladen. | |
To adjust the clearance between the "U" bolts of the pneumatic lifter (11) and the beam of the 3rd auxiliary axle, screw or unscrew the bottom nuts (8) and top nuts (10), as necessary, until obtaining the specified measurement. | |||
Vehicle 693.127, 695.301/304Maximum C play required between the lifting clip and the 3rd auxiliary axle's beam | |||
Vehicle 693.193/194Maximum C play required between the lifting clip and the 3rd auxiliary axle's beam | |||
18 | After setting the clearance “C” tighten the upper self-locking nuts of the clamps (10) to the specified torque | Vehicle 693.127, 695.301/304Lifting clamp upper nuts of the third auxiliary axle | |
Vehicle 693.193/194Lifting clamp upper self-locking nuts of the 3rd auxiliary axle | |||
19 | Remove the protection plug and connect the pneumatic pipe to the pneumatic connection (13) | ||
20 | Turn-on the master switch or connect the battery negative cable and run the engine until normal pneumatic system service pressure is attained | ||
21 | Actuate the control switch on the dashboard, lifting and lowering the 3rd auxiliary axle from 7 to 8 times to accommodate the pneumatic lifter components | With the pneumatic lifter pressurized (3rd axle lifted), check the pneumatic lifter for tightness applying soap foam or appropriate spray to detect any trace of air leakage. | |
22 | Check once again the clearance between the lifter's "U" bolts and the tube of the 3rd auxiliary axle | If necessary, correct the clearance. | |
Vehicle 693.127, 695.301/304Maximum C play required between the lifting clip and the 3rd auxiliary axle's beam | |||
Vehicle 693.193/194Maximum C play required between the lifting clip and the 3rd auxiliary axle's beam | |||
23 | Carefully confirm if the nuts (9) of the pneumatic lifter bellows bottom and top fastenings are firmly tightened | ||
24 | Check if the top self-locking nuts (10) of the pneumatic lifter's "U" bolts are tightened to the specified torque. | Vehicle 693.127, 695.301/304Lifting clamp upper nuts of the third auxiliary axle | |
Vehicle 693.193/194Lifting clamp upper self-locking nuts of the 3rd auxiliary axle |