pg_restore does not restore blobs
I've faced the same issue some months ago, and I have managed to solve it with a bash script. This is the piece of code that take care to backup large objects, and save it to a local folder (/path/to/destination/lo/folder/) with filename = oid (the filename is important in order to restore lo with same oid) : 

echo -e "going to export largeobjects belonging to community $i..." &amp;&amp; sleep 2
psql -U &lt;username&gt; -X -c "SELECT file_oid FROM &lt;my_table&gt;" \
    --single-transaction \
    --set AUTOCOMMIT=off \
    --set ON_ERROR_STOP=on \
    --no-align \
    -t \
    --field-separator ' ' \
    --quiet \
    -d &lt;my_source_db&gt; \
| while read file_oid ; do
    echo "Exporting largeobject OID: $file_oid"
    ${PSQL} -d &lt;my_source_db&gt; -c "SELECT lo_export($file_oid, '/path/to/destination/lo/folder/$file_oid');"
done


Then to restore them I've written this other piece of code:

echo "going to import largeobjects belonging to community $i..." &amp;&amp; sleep 2
LOBJECTS=/path/to/destination/lo/folder/*
for f in $LOBJECTS
do
    echo "Processing $f file..."
    filename=$(basename "$f")
    oid=${filename}

    psql -U &lt;username&gt; -d &lt;my_source_db&gt; -c"
    -- check if largeobject is already present, if it is delete it
    SELECT lo_unlink(${oid});"

    psql -U &lt;username&gt; -d &lt;my_source_db&gt; -c"
    -- import largeobjects
    SELECT lo_import('$f', ${oid});
    "
done


Out there it may exist a simpler solution, but at the time I've not been able to find it, this is why used this approach. I hope you will be more lucky and find a cleaner solution. I'll follow this post in case I can learn something useful too : )