GearS6S7MotorService

S6 and S7: Removing the Motor Assembly

The procedure our service bench follows to take the motor out of an S6 or S7 — and the exact point where owner maintenance has to stop.

HW
Hannah WrightPADI Course Director · 3,200+ logged dives · Updated Oct 11, 2026
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Read this part first

This article documents what our service technicians do, not what we recommend owners do. Taking the motor out of an S6 or S7 requires opening the sealed compressor housing, and once that housing is open, the warranty on that assembly ends — that is stated in the warranty policy, and it applies to us too: we log every service. If your machine is inside its cover period and the motor is suspect, send it to us instead.

Lifting the lid on the S6/S7 service hatch
The service hatch comes off with the machine on its side. Battery isolated first, always.
The motor assembly exposed

Disconnecting the assembly

The loom connector is keyed and only comes off one way, but the grommet that passes through the housing wall is the part to be careful with — forcing the connector through tears the grommet, and a torn grommet is a water ingress path that will not show up until the machine is in the water. Note the mount bolt positions before you lift the assembly; the two sides are different lengths and swapping them distorts the mount.

Checking mount torque on refit
Refit is the reverse, with mount bolts torqued to specification rather than tight.

Why the S6/S7 procedure differs from the S9

On the S6 and S7 the motor and compressor sit in a shared housing, which is why the whole assembly comes out as one unit. The S9 uses a different internal layout and the two halves separate independently, so its procedure is a different job with different tooling. Do not assume the steps carry across between models.

FAQ

Do I need a diving certification?
Yes. These are surface-supplied breathing systems for certified divers (Open Water or equivalent). Always dive with a buddy, a dive computer and within no-decompression limits.
How deep can I go?
S6 is rated to 8 m, S7 to 12 m, S9 to 20 m and S77 to 29 m. Always dive to the rated depth, never the laboratory-tested figure.
What happens if the battery runs low?
The unit sounds a low-battery alarm and the display shows remaining charge. Plan to start your ascent with at least 25% remaining, and carry a spare-air cylinder.

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