Reconditioning The Shift Mechanism; Types Of Shift Mechanisms; Shift Mechanism Type 1 - Volvo Penta AQUAMATIC 280 Workshop Manual

Repair instructions

Reconditioning the shift mechanism

Types of shift mechanisms

For the models 280, 290, 285, 285A and 290A there
are 3 different types of shift mechanism. The first
type was installed up to and including serial no PZ
2829528. As from serial number PZ 2829529 the sec-
ond type – where the ball, spring and the locking wire
were removed – was installed. There is a somewhat
different dismantling and assembly sequence for each
type.
The third type and the shift mechanism for models DP
and SP are described on pages 68–72.
NOTE! The upper gear head does not have to be re-
moved from the intermediate housing, nor the stern-
drive from the transom shield, to replace the shift
mechanism.
1. Remove the shift mechanism from the upper gear
head.
64

Shift mechanism type 1

2. Knock out the load pin (1, figure above) and pull out
the pin (2). Remove the locking wire (3), the springs
(4) and the balls (5) and pull out the excentric piston
(6). Remove the sealing ring (7). Wash the parts and
check for wear and replace parts where necessary.
7
1
5
3 4 2 6