Usage:
CB-534B (4JL) Vibratory Compactors
Reference: Operation & Maintenance Manual, KEBU6751, for CB-534B Vibratory Compactor, Page 48, Operation Section, Towing information.
Description of Change: A brake release pump is now available for CB-534B Vibratory Compactors. The new brake release pump contains a needle valve and a hand pump that are used to hydraulically release the brakes when the machine must be towed.
Adaptable To: The new 119-3680 Brake Pump Group is effective with CB-534B (4JL166-Up). The new pump is adaptable to first production when installed according to the procedure that follows. The chart lists all of the parts needed to install the new pump.
Procedure To Install Brake Release Pump
1. Drain oil from the hydraulic tank. Use a suitable container or procedure to prevent contamination to the environment.
Illustration 1. Top View Of Machine
Illustration 2. View A-A Of Illustration 1 (A) Plate to be modified.
2. Drill and tap two mounting holes (F) in plate (A) as shown in Illustration 3.
NOTE: Later machines may already have holes in the plate for mounting the brake pump.
Illustration 3. View Of Plate (A) From Front Of Machine (B) 172.0 mm (6.78 in). (C) 140.7 mm (5.54 in). (D) 252.0 mm (9.92 in). (E) 321.1 mm (12.64 in). (F) 5.2 mm (.20 in) Dia., M6X1-6 Thread, two holes.
Illustration 4. Installation Of Brake Pump And Fittings See chart for identification of parts.
3. Install fittings that are identified in Illustration 4 to hand pump group (6). Install the assembled components to plate (A) with bolts (4) and washers (5).
Illustration 5. Return Lines BEFORE Brake Pump Installation (G) Line (rear vibratory motor case drain). (H) Line (propel case drain). (J) Fitting. (K) Line (front vibratory motor case drain).
Illustration 6. Position Of Return Lines AFTER Brake Pump Installation See chart for identification of parts. (G) Line (rear vibratory motor case drain). (H) Line (propel case drain). (L) Tee.
4. Disconnect line (K). Remove fitting (J) and discard. Install adapter (12) with O-ring (13). Install tee (14) with O-ring (15) to adapter (12). Connect line (K) to the end of tee (14).
5. Disconnect line (G) from existing location. Connect line (G) and O-ring (15) to the open port on tee (14).
6. Disconnect line (H) from existing location. Connect line (H) to the open port on tee (L). Loosen tee (L) and rotate it to provide the correct orientation for assembly.
Illustration 7. View A-A From Illustration 1 (M) Clamps. (N) Port. (P) Hose.
7. Remove and discard existing hose (P). Connect the end of hose assembly (18) that has a 90° elbow to the open port on tee (8). (Tee (8) is installed on the hand pump in Step 3). Route hose assembly (18) through three clamps (M) and connect the other end to port (N), where the former line (P) was connected.
Illustration 8. View Of Pump Compartment BEFORE Brake Pump Installation (Q) Tee. (R) Tee. (S) Hose.
8. Remove and discard hose (S) which runs to the brake port on the front propel motor. Remove the remaining hose from tee (R) and connect it to the same position on tee (Q). Remove and discard tee (R).
Illustration 9. View Of Pump Compartment AFTER Brake Pump Installation See chart for identification of parts. (T) Clamp.
Illustration 10. Return Lines AFTER Brake Valve Installation See chart for identification of parts. (L) Tee. (U) Elbow.
9. Attach hose assembly (19) to the end of tee (Q). Attach the other end of hose assembly (19) to 6V-8627 Elbow (U) at the bottom of needle valve (11).
10. Secure hose assembly (19) to the existing stack of clamps with bolts (20), plate (21) and clamps (22). See installed parts in Illustration 9.
11. Install hose assembly (17) in place of hose (S) that was removed in step 8. Connect one end of hose assembly (17) to the brake port on the front propel motor. Connect the other end of hose assembly (17) to the open port on tee (7).
12. Secure hose assembly (17) in clamp (T) where former hose (P) was fastened. Secure the remainder of hose assembly (17) in the clamps which retained hose (S).
13. Install hose assembly (16) between the open port on tee (L) and the remaining open port on the pump assembly (upper elbow (1) in Illustration 4).
Brake Release Pump Operation
Illustration 11. Brake Pump Operation (V) Pump knob. (W) Needle Valve.
Normal Operation
During normal machine operation, needle valve (W) must be in the fully open position (fully counterclockwise position).
Towing
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Personal injury or death could result when towing a disabled machine incorrectly.
Block the machine to prevent movement before releasing the brakes. The machine can roll free if it is not blocked.
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NOTE: Follow the recommendations below to perform the correct towing procedure.
Follow the towing instructions in the Operation and Maintenance Manual. When the instructions indicate to "manually release the parking brake", perform the following steps.
1. Turn needle valve (W) clockwise to the fully closed position.
2. Move pump knob (V) in and out (for approximately 40 seconds) until it is no longer possible to move the pump knob by hand.
3. To re-apply the parking brake, turn needle valve (W) counterclockwise to the fully open position.