2011/06/06 Caterpillar

Articulated Truck:

735 (S/N: B1N1-UP; AWR606-UP)

735B (S/N: L4D1-UP; T4P1-UP)

740 (S/N: AXM1324-2154; B1P1-UP)

740 EJECTOR (S/N: B1R1-UP; AZZ336-390)

740B (S/N: L4E1-UP; T4R1-UP)

740B EJECTOR (S/N: L4F1-UP; T4S1-UP)

Description of Change: Grit blasting of seal ramps on the brake cover housing and wheel is no longer required. An improved seal and retainer ring has been released. An accumulator has also been released to remove pressure spikes.

Adaptable To: The accumulator will improve the life and performance of the seal and retainer ring. The accumulator will be adaptable to older machines.

The improved seal and retaining ring will be adaptable to older machines.

Illustration 1	g02583378
Standard HDDF Seal Bore

Illustration 2	g02583380
HDDF Seal Converted to Duo Cone Type with Retainer Ring

Illustration 3	g02583336
Location of the accumulator

Table 1

Required Parts
Item	Qty	New Part Number	Description	Former Part Number
1	1	363-4457	Seal Kit	219-0615

The accumulator is adaptable to the following machines:

• 735 (S/N: AWR589-UP)

• 735 (S/N: B1N1-1366)

• 740 (S/N: AXM1183-UP)

• 740 (S/N: B1P1-5412)

• 740 EJECTOR (S/N: AZZ327-UP)

• 740 EJECTOR (S/N: B1R1-512)

The accumulator will be effective in production on the following machines:

• 735 (S/N: B1N1367-UP)

• 740 (S/N: B1P5413-UP)

• 740 EJECTOR (S/N: B1R513-UP)

The new seal and retainer ring are adaptable to the following machines:

• 735 (S/N: AWR606-UP)

• 735 (S/N: B1N1-UP)

• 740 (S/N: AXM1324-UP)

• 740 (S/N: B1P1-UP)

• 740 EJ (S/N: AZZ336-UP)

• 740 EJ (S/N: B1R1-UP)

The new seal and retainer ring will be effective in production on the following machines:

• 735 (S/N: T4P1-UP)

• 740 (S/N: T4R1-UP)

• 740 EJ (S/N: T4S1-UP)

• 735 (S/N: L4D1-UP)

• 740 (S/N: L4E1-UP)

• 740 EJ (S/N: L4F1-UP)